Chevrolet Colorado overheating problems

Filed Aug 31, 2026 · Engine · CO

Engine cooling system has a known leak. It is rather expensive out of pocket and although there is now a tsb the tsb does not cover the danger of overheating an engine and being stranded on the side of the road. Also the coolant leaking causes an unseen hazard by polluting water supplies with one of the more known toxins to the water and environment.

Filed Jun 11, 2026 · Electrical, Engine · CA

Issue 1: Cooling Fan Remained On After Engine Shutdown Component or system involved: Engine cooling system and fan control system, including the radiator cooling fan, fan relay, coolant temperature sensor, wiring, or engine control module (ECM). The vehicle is available for inspection upon request. What happened: After turning off the engine, the radiator cooling fan remained running continuously for approximately five minutes and would not shut off as expected. No warning light, message, or other dashboard indication appeared before or during the event. This was unusual behavior compared with normal operation. Safety risk: The unexpected fan operation created concern that the cooling system was malfunctioning and that the vehicle could overheat, experience an electrical problem, or become unreliable while driving. A cooling system or electrical failure while in traffic could put me and other drivers at risk. Reproduction or confirmation: The issue occurred several time and was confirmed by a Chevrolet dealer, and was told that my warranty did not cover the issue. I took it to outside mechanic to fix the issue as Chevrolet wanted to charge over $1500 for the issue. No warning lamps, messages, overheating indicators, or other symptoms appeared before the fan remained on. The problem occurred suddenly back in 2025. Issue 2: Ignition Key Gets Stuck and Cannot Be Removed Ignition lock cylinder, ignition switch, transmission shift-interlock system, park-position switch, or steering column lock mechanism. The vehicle is available for inspection upon request. The ignition key intermittently becomes stuck and cannot be removed from the ignition. The problem occurs after parking and turning the vehicle off, and I sometimes need to move the shifter or steering wheel repeatedly before the key can be removed. A stuck ignition key can prevent me from properly shutting down and securing the vehicle. It may also indicate a failure in the ignition or shift-interlock system.

Filed May 13, 2026 · Engine · WA

The upper radiator hose on some huge percentage of these trucks fail (mine has failed at just over 35k miles). You can check the Colorado Chevy forum, youtube, etc., et al, and find plenty of instances where this has failed. As this is the cooling system, it can cause the engine to overheat and potentially ruin the engine. The flaw seems to be an engineering issue with the rubber seal they use (instead of a high quality o-ring) to seal the upper hose to the radiator. Additionally, since this can cause engine failure it should be addressed immediately. Instead, my local Chevy dealer, since its not a recall item, said they could schedule a time next week for me to LEAVE the truck and then they would get to it in 7-10 days. This is extremely unfair to the consumer who depends on these vehicles. This should absolutely be a recall item. You can find 1000's of examples online and if you can pull GM repair data, I'm sure you'll find 1000's more.

Filed Apr 20, 2026 · Engine · MT

Coolant leaking from the upper radiator inlet hose connection. The Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC).

Filed Apr 9, 2026 · Engine · CA

Coolant leak, upper radiator hose, TSB issued PIT6494A over $500 repair. Not covered under any warranty.

Filed Mar 30, 2026 · Engine · SC

Coolant leaking from the upper radiator inlet hose connection

Filed Mar 18, 2026 · TX

The upper radiator hose on some huge percentage of these trucks fail (mine has failed at just over 5k miles). You can check the Colorado Chevy forum, youtube, etc., et al, and find plenty of instances where this has failed. As this is the cooling system, it can cause the engine to overheat and potentially ruin the engine. The flaw seems to be an engineering issue with the rubber seal they use (instead of a high quality o-ring) to seal the upper hose to the radiator. Additionally, since this can cause engine failure it should be addressed immediately. Instead, my local Chevy dealer, since its not a recall item, said they could schedule a time next week for me to LEAVE the truck and then they would get to it in 10-14 days. This is extremely unfair to the consumer who depends on these vehicles. This should absolutely be a recall item. You can find 1000's of examples online and if you can pull GM repair data, I'm sure you'll find 1000's more.

Filed Mar 11, 2026 · Transmission · MN

A few weeks ago the heat started performing intermittently, about half the time only blowing out cold air even with the temperature set to 85°. I live in Minnesota and we have had numerous weeks of below 0 temperatures. Lo and behold, I find out there are widespread reports of the O ring seals on the radiator and heater hoses failing and causing coolant leaks. These leaks are significant enough to render the vehicle inoperable and with no cabin heating or cooling. This could lead to life-threatening situations in adverse weather conditions. It could also create dangerous roadside failure situation in heavy traffic, particularly on interstate highways. Dealers are aware of the issue and are currently repairing vehicles under warranty. However some dealers are telling owners that the cooling system is not part of the engine and drivetrain, and therefore is not covered under the original factory warranty if the vehicle has exceeded the initial bumper to bumper warranty limits. Dealers are also telling owners that parts are on backorder due to high demand, and that repair wait times could take weeks. The vehicle is unsafe to operate with a known coolant leak.

Filed Mar 11, 2026 · Engine · TX

The upper radiator hose on some huge percentage of these trucks fail (mine has failed at just over 20K miles). You can check the Colorado Chevy forum, youtube, etc., et al, and find plenty of instances where this has failed. As this is the cooling system, it can cause the engine to overheat and potentially ruin the engine. The flaw seems to be an engineering issue with the rubber seal they use (instead of a high quality o-ring) to seal the upper hose to the radiator. Additionally, since this can cause engine failure it should be addressed immediately. Instead, my local Chevy dealer, since its not a recall item, said they could schedule a time next week for me to LEAVE the truck and then they would get to it in 7-10 days. This is extremely unfair to the consumer who depends on these vehicles. This should absolutely be a recall item. You can find 1000's of examples online and if you can pull GM repair data, I'm sure you'll find 1000's more.

Filed Mar 6, 2026 · Engine · NY

The upper radiator hose on some huge percentage of these trucks fail (mine has failed at just over 20K miles). You can check the Colorado Chevy forum, youtube, etc., et al, and find plenty of instances where this has failed. As this is the cooling system, it can cause the engine to overheat and potentially ruin the engine. The flaw seems to be an engineering issue with the rubber seal they use (instead of a high quality o-ring) to seal the upper hose to the radiator. Additionally, since this can cause engine failure it should be addressed immediately. Instead, my local Chevy dealer, since its not a recall item, said they could schedule a time next week for me to LEAVE the truck and then they would get to it in 7-10 days. This is extremely unfair to the consumer who depends on these vehicles. This should absolutely be a recall item. You can find 1000's of examples online and if you can pull GM repair data, I'm sure you'll find 1000's more.