It is worth a shot considering a rebuilt/new cluster is roughly $350 .... The grounds for your dash are down at your feet on the drivers side, so the ground that you found is not the correct ground for your cluster. 2001 Silverado 1500 LS z71 5.3 [SOLD] 2016 Silverado 1500 LT z71 5.3. Like.WOODY RUDY said: THE PCM commands the low speed cooling fans on when engine coolant exceeds 220 degrees. The PCM commands the high speed cooling fans on during the following conditions: engine coolant temp. exceeds 220 degrees and a\c refrigerant pressure exceeds 265 psi. If the fans don't come on at the temp. check the temp sensor or relays out.Here is a list of the most common causes of random stalling: Faulty alternator. Fuel pump damaged. Fuel filter needs replacing. Damaged/worn out spark plugs. Dirty/faulty throttle body. Camshaft and/or crankshaft position sensors faulty. Mass air flow sensor faulty. Throttle position sensor failure.My heat gage stays at 160 and my cooling fan runs even after the truck is turned off. I have a 2016 Chevy Silverado 1500 5.3 1500, I've changed the temp sensor and the thermostat. ... 2016 chevy silverado fan keeps running after engine is shut off ...The fan starts running on high speed and continues to run loud about 5 min after I shut the truck off. I just got an oil change and a tune up but it’s still doing it Mechanic's Ass... Have a 2015 Chevy suburban with 113000 miles. The fan starts running on high speed and continues to run loud about 5 min after I shut the truck off.1 post · Joined 2024. #5 · Feb 25, 2024. Check the specs on your truck and you can figure it out pretty quick. The outlet on my '24 2500 says 400W/120V. That means it is capable of running 3.3 amps max (watts/voltage). Most power tools require much more (my circular saw runs on 15 amps), but you can usually find the specs for whatever it is ...Why Fan Clutch Not Disengaging. Sometimes it's overlooked. Check that the hub's bolts are not mechanically locked. If you have a horton, there are two bolt holes in the front where you may thread 2 3/8 bolts to manually lock the hub in the event of clutch failure. Also, with the engine off and the key off, the hub should be locked; yet ...Silverado Fan Keeps Running When Truck is off One of the most common problems among Chevrolet Silverado owners is that their fan keeps running even when the truck is turned off. This can be an annoying and sometimes dangerous issue, as it not only wears down your battery power but also increases fuel consumption due to running unnecessarily.Today after running the air conditioner for the first time since last fall, when I shut it off and took the key out, the AC fan kept running and wouldn't shut off. I started the vehicle back up, tried to shut the fan off on the console, but it would not shut off. Now the fan has continuously run for 5 hours and my 6-month-old battery is now dead.Remove the temperature sensor. This is usually found under the distributor. If you find that the fan stops running immediately, the issue lies with the sensor. Check for a faulty radiator control module and do a replacement. This module is normally located near the glove box. Look out for a stuck cooling fan relay.Welcome back to the channel! In this video Sean goes over why the radiator fan won't turn off on your 2014 - 2019 Chevy Silverado or GMC Sierra. Thermostat...My problem is when the ignition is off the blower motor for the a/c-heater keeps running. My electric windows also work when the ignition is off. ... I have an 01 Z71 Silverado, the heater blower stays on even if the truck is off and the keys are out of the ignition. ... I went to turn off truck and the heater fan did not shut off, even when ...Cooling fans running on high speed. I have a 2014 Chevy Silverado 1500 5.3l that I am having a issue with the cooling fans running on high occasionally. When this happens my temp gauge will read zero and when I kill the engine the fans stay on. The only way to shut them off is to crank the engine and shut it right back off.Conditions for Running the DTC. • The ignition voltage is between 8-18 volts. • The engine speed is more than 40 RPM. • The ECM driver transitions from ON to OFF or from OFF to ON. Conditions for Setting the DTC. • P0481--The PCM detects an open circuit on the high speed cooling fan relay control circuit.The part I bought is the blower control module that goes next to the blower motor. ACDelco 15-81638 GM Original Equipment Heating and Air Conditioning Blower Control Module. 4.5 out of 5 stars 38 Reviews. Price: $28.98 Free Shipping for Prime Members.When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components. Locate cooling fan circuit components. ... My 1995 Accord's fan only runs after I shut the motor off. I've replaced the fan timing unit, switch, thermostat, and tried swapping relays and topped it off after ...Draining the old gas and replacing it with a new one helps you solve the Silverado engine stopping running while driving. 4. Battery Cables. Improperly bolted or rusted battery cables can also be responsible for sudden shut-off when you are on the road. Follow what is connected to the black ground cable.Jumped it off and all was fine until I got to job and took key out of ignition to find it still running, all accessories turned off as should. Also once key was turned to the off position the transmission went into a limp mode where it would not shift out of 3rd and had poor performance. The only way to correct the transmission and engine power ...2014 chevy silverado fan wont shut off 2007*-2013 silverado 1500 dual cooling fan Fans fan radiator engine cooling 2005 chevy replacement carid shrouds silverado 2008 semi parts repair 2006 auto blades truck 2007. 2014 Chevy Silverado Fan Stays On After Car Is Off 99-06 silverado electric fan install, not aftermarket. 09 2009 chevrolet ...Chevy silverado blower fan controller fixBlower panel Silverado wont start after electric fanChevy silverado fan wont shut off. Check Details. How to fix a noisy blower fan. 2016 chevy silverado fan wont shut offGmc sierra fan keeps running How to remove the fan on a 1999 silverado 2500Chevrolet radiator fans not working.. Check Details. Check ...Climate Control Issue. Ok everyone new here and new to vehicle forums so here we go. Currently working on restoring/modernizing my '90 k15 and when I got it had to rewire a lot of things inside the dash area to get somethings including heater to work properly. Now I got my blower to work via my control module and put out heat without leaking ...Try tapping on the resistor. If the contacts are "welded" from too much amperage draw, it should stop with a gentle tap (the high speed relay is in the resistor). If it's not that, like rigrat said, new controller is next (or some crazy wiring issue). 2012 GMC 2500 SLT 4x4. --- Arizona Diesel Club ---.Here are among the common reasons why your Volvo fan won't turn off. 1. Coolant Level Temperature Sensor. In most cases, a problematic coolant temperature sensor can cause the fan to stay on. This is the issue with fans that keep on running even after you have turned your engine off for a while. Your car's coolant temperature sensor is ...Also when the truck is running with the a/c on you cant switch fan speeds Chevy Mechanic: Randall J , Auto Mechanic replied 5 years ago 99% you have a bad blower motor control processor.Ensure all battery connections are secure and clean to prevent power leakage. Examine the starter solenoid, which may be faulty if engine keeps running when ignition is turned off. Replace any damaged parts such as spark plugs, wires, coils, etc., to restore proper functioning of the engine system.917 posts · Joined 2013. #7 · Sep 1, 2017. I had same issue b4 with a scosche interface. Radio would randomly shut off for for no reason. Sometimes I'd have to pull the positive cable off to reset it. Ended up changing the interface to a regular harness, problem solved. Mike. Like. Rambodog.SOURCE: 2004 Chevrolet Silverado Heater/AC Blower on without Ignition ON there is no relay for the heater fan it's a 15 amp fuse and is on the accessories circuit. the reostat is responsible for all 3 speeds .with the key off there should be no voltage to the blower motor whether the fans speed fan switch is on or off. the fuse will be located in the fuse paneleither on the drivers left side ...3. Bad ECU Unit. Your Chevy’s engine control unit signals the fan when to turn off or keep running. A defective ECU will result in the fan not knowing when to stop running. 4. Low Coolant Level. The car coolant is the liquid that removes heat from the radiator. The lower the coolant level, the less effective it’ll be.3. Bad ECU Unit. Your Chevy's engine control unit signals the fan when to turn off or keep running. A defective ECU will result in the fan not knowing when to stop running. 4. Low Coolant Level. The car coolant is the liquid that removes heat from the radiator. The lower the coolant level, the less effective it'll be.If you’re a truck driver or own a trucking company, finding loads to haul is essential for keeping your business running smoothly. In the past, this process may have involved count...Check Details Callaway chevy silverado sc602 gains a supercharger and keeps its warranty. 2000 chevy silverado fan clutch 5.3l 2000-2002 tahoe avalanche suburbanCallaway silverado chevy signature gains supercharger slashgear 2012 chevy silverado 2500hd, keeps burning fuse for fuel pump. changedSilverado chevy chevrolet naias live autoevolution trucks visit.Radiator fan staying on all the time. I have a 2016 Colorado 3.6 with 231,200 miles on it. A week ago my radiator fan started coming on as soon as I started the truck and would stay on while driving. Temperature never got over 160. When I shut the engine off the fan would stay on for about 5 minutes and then shut off.18 posts · Joined 2022. #1 · Apr 7, 2022. Hello all. I recently bought a 2017 and after driving it about 1500 miles (74500k on vehicle), Something strange started happening. When I got to work yesterday, I noticed the fan running after I shut the engine off. I opened the hood, checked the coolant it was good. Felt the hoses they were luke ...May 15, 2013 · Conditions for Running the DTC. • The ignition voltage is between 8-18 volts. • The engine speed is more than 40 RPM. • The ECM driver transitions from ON to OFF or from OFF to ON. Conditions for Setting the DTC. • P0481--The PCM detects an open circuit on the high speed cooling fan relay control circuit.This can cause the fan to seem like it is running too much as once it turns off, it is only a brief time before the pressure is back up to 300 again, and the fan is once again commanded on. If your fan is kicking in at way less than 300, the pressure switch is faulty. If the pressure rises way too quickly, the condenser may not be cooling properly.You are right to be concerned, as this amount of time could drain the car's battery, which would leave you having to jump-start your car. It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. However, if the fan is running for an extended period, the fan itself can ...2. Radiator Fan. Depending on the model year and the engine, your Silverado could have a clutch fan or an electric fan. A bad fan can cause your engine to run hot. The fan pushes air over the radiator to keep it running cool. When you are out on the highway, the wind passing over the radiator is more than enough to keep it cool.Most vehicles need 25 to 35 pounds per square inch of Freon on the low side if the vehicle is running with the air conditioner on its coldest setting and fastest fan speed. The amo...205 Chevy truck 1500 Silverado 5.3V8 The radiator fan keeps going after the truck is sht off and drains the radiator. I need a picture of the auxilliary panel for the elctric fan close up and from a distance so I can take it to the jung yard and get the part or where can I get just this auxilliary fuse panel for the electric fan which cools the radiator.Subject: 11046 - Special Coverage Adjustment - Heating, Ventilation, and Air Conditioning Blower Not Fully Functional on All Blower Speeds, Inoperative, or Runs Continuously with the Ignition Off. Models: 2003-2006 Chevrolet Avalanche, Suburban, Tahoe. 2003-2007 Chevrolet Silverado. 2003-2006 GMC Yukon, Yukon XL.Silverado Fan Keeps Running When Truck is off One of the most common problems among Chevrolet Silverado owners is that their fan keeps running even when the truck is turned off. This can be an annoying and sometimes dangerous issue, as it not only wears down your battery power but also increases fuel consumption due to running unnecessarily.2014 chevy silverado fan keeps running Fan silverado electric install factory Installing electric fans on my 2004 2500 silverado 6.0 ... Radiator cooling fan keeps running when car engine is off and it won't ... 1500 Fans fan radiator cooling 2005 chevy engine replacement carid shrouds silverado 2008 repair parts 2006 auto blades truck 2007 ...Motor City Rick. 2819 posts · Joined 2017. #2 · Oct 7, 2017. The most common cause is the vent valve solenoid is stuck in the "closed" position. This is the solenoid behind the gas tank (see diagrams) with the wires attached. Get only a factory brand Delco, nothing else.I have an 2005 impala and I replaced the blower, switch, and still can get the fan to turn on. I direct wired the fan to the battery just to make sure it worked and yes it does. The switch is also working cause when I shut the a/c off I hear the compressor turn off and on. I just can't get the fan to turn on.Disconnect your battery for a couple seconds and then restart your truck, if the temp gauge works than it's probably not your sensor. When the truck senses incorrect temp (thermostat being stuck) it goes into a fail safe mode where the temp gauge reads nothing and fan stays on. 2. Reply.Ensure all battery connections are secure and clean to prevent power leakage. Examine the starter solenoid, which may be faulty if engine keeps running when ignition is turned off. Replace any damaged parts such as spark plugs, wires, coils, etc., to restore proper functioning of the engine system.Reasons For Silverado Engine Keeps Running When Ignition Turned Off; Some Other Symptom's; Silverado Engine Keeps Running When Ignition Turned Off: How To Fix It? 1. Safety First: 2. Turn Off the Engine: 3. Wait and Observe: 4. Check for a Stuck Key Cylinder: 5. Verify the Starting Interlock Switch: 6. Inspect the Throttle Body and TPS: 7.2014 silverado has engine fans running after truck turned off, ... 2009 silverado, Temp gauge at 160, Fan on at all times. ... 2015 Tahoe coolent fan keeps running while vehicle is off and temp gauge is stuck on 160 or off . What is the problem ...Coolant temp sensor replacement Thermostat & Coolant temperature sensor replacement: Yukon, Tahoe, Sierra, Silverado, Escalade GMhttps://youtu.be/7mJF5LQ3oPs...7 posts · Joined 2008. #1 · Jul 20, 2008. I have a 2003 5.3L Silverado 1500 with 76,759 miles that my son drives. A couple of weeks ago it started this problem. It will start, but dies immediately. The things I've done to it so far is: 1) Bought a new fuel filter, 2) But first I put a new PCV valve and grommet (Autozone salesman recommended ...Conclusion. Car fans staying on after the engine is turned off may be caused by several reasons, such as low coolant level, malfunctioning cooling system, still-on A/C system, electrical issues, or computer control. A low coolant level can cause the engine to run hot, resulting in the need for the fan to run more frequently to keep the engine cool.The system can be turned back on. by pressing either O, D, C, #, the defrost or the AUTO button". and Remote Start w/ Auto Climate: "If the vehicle has an automatic. climate control system, the climate. control system will default to a. heating or cooling mode depending. on the outside temperatures.The cooling fan relay will be commanded ON when the following conditions are met: - The engine coolant temperature reaches 106°C (223°F) or more. - The A/C clutch requested. - The vehicle speed is less than 38 MPH. The cooling fan relay will be commanded ON regardless of vehicle speed when the following conditions are met: - The engine ...Mar 5, 2023 · 2015 Radiator Fan/Coolant Temp Issue. 2015 GMC Sierra 5.3. The other day I noticed my radiator fans constantly running at full blast and staying on for 5 minutes after shutdown - saw that the coolant temp gauge was pegged low. I replaced the coolant temp sensor and the problem is still there. Looking at the live data on my OBDII scanner, I can ...GM has released a fix to address a parasitic battery drain issue that affects certain examples of the 2021 Chevy Silverado 1500 and 2021 GMC Sierra 1500 trucks. Only certain trucks with the 5.3L ...Reasons For Silverado Engine Keeps Running When Ignition Turned Off; Some Other Symptom's; Silverado Engine Keeps Running When Ignition Turned Off: How To Fix It? 1. Safety First: 2. Turn Off the Engine: 3. Wait and Observe: 4. Check for a Stuck Key Cylinder: 5. Verify the Starting Interlock Switch: 6. Inspect the Throttle Body and TPS: 7.Ambient air temp sensor, located behind the grill costs about $6. I've replaced mine about 4 times on my 2014 silverado now but it doesn't fix the problem. I've noticed if I let the truck warm up first when its really cold it doesn't trip as much, only way to reset is disconnect battery for about 5-10 minutes....Conclusion. Car fans staying on after the engine is turned off may be caused by several reasons, such as low coolant level, malfunctioning cooling system, still-on A/C system, electrical issues, or computer control. A low coolant level can cause the engine to run hot, resulting in the need for the fan to run more frequently to keep the engine cool.Got a 2015 Tahoe the electric fans stay on after I cut the truck off. I changed out the thermostat and the temp sensor, but I can't figure out the problem, now the heater blows cold air and the air blows hot air I'm lost please need help TIA ... coolant temp came up from 160 and the fan did not come on. Im thinking the coolant temp sensor ...Key Takeaways. A car fan is designed to run for a few minutes after the engine is turned off. If the fan runs longer than a few minutes, you may have low coolant levels, a coolant leak, a faulty cooling fan, a damaged radiator, or an overheated engine. Replacing a car fan generally costs around $550 to $650.Feb 17, 2021 · 2014 and newer chevy silverado 5.3L. The radiator fan stays on when the engine is off. Fan runs faster than normal and run when engine is cold. Replace the t...The sensor had failed, making the gauge read "0". As a failsafe since it has no idea what the actual coolant temp is, the PCM commands both fans on high speed and keeps the A/C off to prevent extra heat from the condenser. It also runs the fans for about five minutes after the key is turned off. Watch the first eight minutes of this veideo:In today’s fast-paced digital world, it is essential to keep our computers running smoothly and efficiently. One of the most common culprits behind a sluggish PC is outdated or mis...Ok. Looked everywhere and can't find anything about this. My radiator fans are all out off whack (simply put). They. run from the time i turn the truck on to the time I shut it off. BUT sometimes they'll shut off for about 30 seconds to 2. minutes and kick back on. Slow then fast then back to.Heater fan won’t run, Heater fan won’t stop running – GM products, Ranier, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Envoy GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor.2005-2007* Silverado 1500 Dual Cooling Fan. Check Details. 2005-2007* silverado 1500 dual cooling fan. Fan electric silverado install factoryInstalling electric fans on my 2004 2500 silverado 6.0 Radiator cooling fan keeps running when car engine is off and it won't.. Best 2005 Chevy Silverado Cooling Fan - Home Gadgets. Check Details. What ...CHEVROLET SILVERADO WHY RADIATOR FAN STAYS ON, FAN DOES NOT TURN OFF 2006 2007 2008 2009 2010 2011 2012 2013If you have Chevrolet Silverado / Chevy Silverado...2. Radiator Fan. Depending on the model year and the engine, your Silverado could have a clutch fan or an electric fan. A bad fan can cause your engine to run hot. The fan pushes air over the radiator to keep it running cool. When you are out on the highway, the wind passing over the radiator is more than enough to keep it cool.The HVAC blower in this 2003 Silverado stays on speed 5 even with the key off. Here's how to turn speed 5 of the blower off (while keeping speeds 1-4) and ho...My heat gage stays at 160 and my cooling fan runs even after the truck is turned off. I have a 2016 Chevy Silverado 1500 5.3 1500, I've changed the temp sensor and the thermostat. ... 2016 chevy silverado fan keeps running after engine is shut off ...Overheated today-high speed cooling fan relay 2014 chevy silverado fan wont shut off Silverado chevy. Silverado factory electric fan install. 2007*-2013 silverado 1500 dual cooling fanSilverado engine installing fans electric chevy 2004 running keep cool 03 silverado 2500 electric fan conversion (9 blade hd fans)2014 silverado fan keeps running.My dads dodge truck always does this and his ac system is discharged and not in use anymore and when the defroster is on and/or the heat it cycles on and off every 30sec. or so. 1995 C1500 4.3L 2WD 5Spd. JET TBI Spacer, JET stage 1 chip, 10mm Taylor custom wires, etc.. 295k miles and still going strong... 2012 Silverado 1500 4WD Z71 5.3L, 135k. M.My problem is when the ignition is off the blower motor for the a/c-heater keeps running. My electric windows also work when the ignition is off. ... I have an 01 Z71 Silverado, the heater blower stays on even if the truck is off and the keys are out of the ignition. ... I went to turn off truck and the heater fan did not shut off, even when ...Heater fan won't run, Heater fan won't stop running - GM products, Ranier, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Envoy GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor.60 posts · Joined 2019. #1 · Dec 9, 2022. Took my 2018 Colorado ZR2 to dealership today because thermostat gauge stopped working and fan kept running after l shut my truck off. Got a call from dealership saying they ran a diagnostic test and couldn't find any problems. When l shut my truck off at dealership they had to jump start my truck.32 posts · Joined 2011. #4 · Nov 13, 2023. The purple wire is smaller, maybe 14-16 gauge, while the red and black are 8-10 gauge going to the resistor. The red and black have 12v regardless of the speed it is set to. There are like 10 different speeds since it is the digital auto climate unit. The purple from the resistor to the fan motor is ...Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF. The radiator and condenser are BRAND NEW. This problem existed before and after the radiator was replaced. The fan continues to run at its maxiumum speed, regardless of the engine temperature.by Admin. The Cadillac Escalade fan won't turn off can be caused by a malfunctioning fan relay switch, a faulty thermostat, or a problem with the cooling fan motor. If your Cadillac Escalade fan won't turn off, it could be due to a few potential issues. Consider replacing the fan relay switch with a reliable option like the Radiator Cooling ...26 posts · Joined 2016. #2 · Aug 1, 2016. I've got the same thing going on and I've asked the same. I thought maybe any performance, aftermarket parts or anything to keep the engine nice and cool but all I got was let the fans do its job. And to clean the radiator stacks. This is my first diesel so I was pretty worried that I was going to OH ...The 2015 Chevrolet Silverado 1500 pickup truck has a maximum towing capacity of 12,000 pounds. This requires the trim level with the EcoTec3 6.2L V8 engine. The Chevrolet special e...I have a 2014 Silverado 5.3L and my coolant temp gauge stops working on my gauge panel and my radiator fan runs wide open. I replaced the coolant temp sensor with an Autozone part on Dec.16. The problem was fixed (I thought). On Jan 4, the problem was back. Gauge bottoms out again to zero and fan runs wide open. I thought maybe just a bad sensor.Web the cooling fan in your car keeps running long after the car is shut off due to a overheating or fault with the relay. The reason behind this could be faulty temperature sensors or. Asked by almazanmike apr 30, 2020 at 07:41 pm about the 2016 chevrolet silverado 1500 lt 4wd.Ideally you need a good quality scanner to look at live data to see what exactly is going on. But try this. Unplug the a/c high pressure switch. If the ECM sees that the high pressure is very high it will command the fans to be on, in an attempt to lower the pressure. If the fans kick off when you unplug the sensor you have found the issue.Jun 20, 2010 · Ambient air temp sensor, located behind the grill costs about $6. I've replaced mine about 4 times on my 2014 silverado now but it doesn't fix the problem. I've noticed if I let the truck warm up first when its really cold it doesn't trip as much, only way to reset is disconnect battery for about 5-10 minutes....In the 2015 Yukon XL, a thermostat stuck in the open position can lead to the engine fan running constantly, even when the vehicle is turned off. ... To diagnose this issue, you can try spinning the fan by hand when the truck is shut off and the air tanks are drained. If the fan cannot be spun, it might be locked due to air pressure, indicating ...All fuses good all relays good. The fan blower for your ac/heater is located under the glovebox. Take your hand and smack the fan blower motor a few times. That's all it took for for mine to start working again. It's been working for over 6 month's now!I have a silverado truck and some motor or fan has started running even after the key is turned off, I have determined - Answered by a verified Chevy Mechanic ... 2014 Chevy 1500 Silverado V6 radiator cooling fan keeps coming on. I already replace the temperature control, it quit for 2 weeks and now comes back on periodically. ... coolant fans ...2015 Sierra 1500 5.3 Cooling fans not running/fan relay. Hi, I have a 2006 Silverado 1500 with the V6. It has electric fans not the clutch fans. After I start the truck, 2 posts · Joined 2021. #1 · Apr 23, 2021. Hello everyone. First post here. I have a 2015 , 2015 Tahoe coolent fan keeps running while vehicle is off and temp gauge is stuck on 160 or off. What , They would need to scan for codes, pressure test the cooling sy, Also, if you smell burning plastic or smoke begins to enter the cabin whe, Hey ladies and gents, I have a 2016 camaro ss1 also. I have been having the, Aug 23, 2009 · Truck keeps running after ignition is turned off, I have a 2006 Silverado 1500 with the V6. It has electric fans not , 7004 posts · Joined 2008. #3 · Mar 14, 2015. one fan turning on/off i, Ensure all battery connections are secure and clean to prevent power, 2013 Silverado 2500HD . brdbest 2013 Chevy Silverado 2500 HD F, Try tapping on the resistor. If the contacts are &qu, If they are turning on during a cold start I would check what the, The Silverado EV RST measures 233.1 inches long, 83.8 inches wide an, 3. Bad ECU Unit. Your Chevy's engine control unit signals th, Here are some reasons why your fan won’t turn off. Low , 9 posts · Joined 2019. #1 · Oct 14, 2023. Hello, This .