Engine And Engine Cooling Problems of Chevrolet Colorado - part 1

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.

See all problems of the 2022 Chevrolet Colorado 🔎.

Since I've had my truck the passenger seat vibrates excessively while driving; the oil alert comes on even when there is oil, current oil change; seems to not have power, shifts hard. What's interesting is that these items come up when I searched on recalls. This truck is not driven hard. . . Mehanic cant figure out what is causing the oil alert, the passenger seat shaking excessively. . And there is a recall on you tube truck was purchased in [xxx], 07/15 have lived in [xxx] since 11/15. This is unacceptable information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2015 Chevrolet Colorado 🔎.

Component: drivetrain, brake, and engine management systems repeatedly fail in a coordinated pattern, with multiple warning indicators activating simultaneously and sudden unintended deceleration occurring without warning. Vehicle available for inspection. Safety risk: most recent failure occurred at highway speed with family including passengers in the vehicle. Without warning, the vehicle decelerated abruptly while multiple dashboard warnings activated at once. Sudden deceleration at highway speed creates immediate risk of rear-end collision from following traffic and loss of vehicle control. Prior dealer confirmation: yes. Curry Chevrolet (scarsdale, NY) has had the vehicle in service for the same defect category on multiple prior occasions, including stays of over a week on at least two visits. The dealer has not permanently resolved the issue — symptoms have now recurred at sixth time. An additional early service visit at the same dealer was not documented with a repair order; I retain contemporaneous text messages establishing that visit occurred. Other inspections: inspected only by curry Chevrolet to date. Gm customer assistance engaged (case #xxx). No police, insurance, or independent inspections. New case has been filed with gm, linked to the previous (case #xxx). Next service visit will be at a different authorized Chevrolet dealer for an independent diagnostic. Warning indicators: yes. In the most recent incident, multiple warning lamps and system alerts activated simultaneously at the moment of deceleration, with no advance warning. Prior incidents showed the same multi-system warning pattern, consistently without predictive indicators. Vehicle is a 2026 Chevrolet Colorado, VIN [xxx], delivered January 2026 with 2,209 miles on the odometer at delivery. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Engine fails it violenty thumps and studders and drops from highway speed with no warning. This is a mfg. Defect and also an extreme safety concern. The engine studders and thumps and we were almost rear ended by a truck when our truck could not go into gear properly. It is very scary! dealership confirmed that they have many vehicles with same issue and recommended a super flush of transmission but not sure this will correct problem or cause more problems. There is no warning when these incidents occur and the driver has no control to avoid it. It is commonly referred to as the chevy thump and studder and a known mfg defect in which gm refuses to pay for repairs causing consumers an extreme hardship! this is an ongoing issue affecting thousands of vehicles and someone is going to die! there is no negligence of operator of vehicle, it is a manufacturing defect that affects thousands of gm vehicles and they are doing nothing about it except expecting customers to keep incurring cost to try to remedy a repair at our own expense which is unfair! the government needs to force a recall at gm's expense!.

See all problems of the 2018 Chevrolet Colorado 🔎.

Engine light came on. Fan ran high. Had it towed to the dealership. Has 39,000 miles on it. Needs a new upper radiator hose due to a defective hose. Apparently, after reading online, gm is aware of this issue. Now we have to pay the diagnostic fee and $850 for a new hose and a flush, as well as the tow bill! now can’t get the part for a week or 8 days and then have to wait on the repair. This is unsatisfactory that there is a known problem and isn’t covered or hasn’t been a recall.

See all problems of the 2023 Chevrolet Colorado 🔎.

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.

See all problems of the 2024 Chevrolet Colorado 🔎.

Truck has 36,669 miles check engine light came on and was idling loud, after being looked at my a Chevrolet dealership came back a faulty radiator hose, and coolant was leaking. Too new of truck for this kind of problem.

Faulty radiator inlet hose, upper radiator hose failure, outlined in pit6494a. This is the third time that the light on the dashboard has come on for failure, the first time they "fixed it" the second time they said it was the battery, it was not!! this time they are saying what it really is, the radiator hose failure, since the vehicle is only 3 years old but over the 36k mile warranty, they will not fix! failure on their part.

I have had my vehicle for less than 2 years and less than 25,000. I had it in for regular maintenance and was told I had no coolant. After a pressure test the dealership told me I had a large crack in the coolant line. It will 2 weeks to get the part and I can’t drive my truck. This needs to be made a recall and the part needs to be made available ASAP. This could of caused serious damage to my engine and could of cause me to have an accident.

Coolant leak, upper radiator hose, TSB issued pit6494a over $500 repair. Not covered under any warranty.

The contact owned a 2015 Chevrolet Colorado. The contact stated that the vehicle was driven and parked in the garage. Upon exiting the vehicle, the contact noticed an abnormal burning smell and smoke coming from under the hood. It was unknown whether a warning had illuminated. The contact opened the hood and noticed that the engine compartment had caught on fire. The contact closed the hood and attempted to restart the vehicle to drive out of the garage; however, the vehicle failed to restart. The contact shifted to neutral(n) and was able to push the vehicle out of the garage. The contact stated that the vehicle burned significantly from the front end to the windshield. The fire was extinguished by the fire department. No fire department report was filed. No police report was filed. There was no injury sustained. There was no property damage. The contact stated that the vehicle was a total loss and was in the process of being towed to a salvage yard. The vehicle did not have full insurance coverage but had liability coverage. The dealer and the manufacturer were not contacted. The failure mileage was approximately 124,000.

Thermostat is having problems. Fan runs over use and thermostat will not open.

See all problems of the 2017 Chevrolet Colorado 🔎.

Coolant leaking from the upper radiator inlet hose connection.

Coolant leaking from the upper radiator inlet hose connection. The malfunction indicator lamp (mil) illuminated in the driver information center (dic).

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.

Copied this from a forum and it's the same thing for me. I'm editing to fit my unique situation. This is an $800 repair at my dealer for a $40 part! 5 day backorder so I'm without a vehicle. The upper radiator hose on some huge percentage of these trucks fail (mine has failed at 37500 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.

Upper radiator hose leak with 36,750 miles(just out of warranty) 3 days after it was at dealer for oil change and replacing the heat shield. Apparently very common in these vehicles which says they are aware but haven't fixed the issue, should be a recall!!.

In and out of the shop for the last 3. 5 years (warranty is expired now) with multiple engin codes (cel). Most having to do with the fuel delivery systems. Most common p026d, and p1089. It has been in the shop at least 6 or more times. Gm won't stand by their product. Since the warranty ended I've put mor than $4,000 in to repairs for this and now I'm told it will cost me anouther $6000 to $7000 to repair. I bout this truck used with 60,000 miles on it and paid cash $50,000 to the dealer the originally sold it to the previous owner. I just want them to fix the issue once and for all. To date they have just thrown parts at it but it never fixes the problem. They have changed the map sensor, the fuel rail and pressure regulator, the injectors, and they've re-wired part of the wiring harness. None of this has solved the issues.

See all problems of the 2019 Chevrolet Colorado 🔎.

Radiator hose near failure, lose of coolant could be catastrophic. Upper radiator hose quick disconnect o-ring inside failed.

Upper radiator hose leak.

Check engine light appeared and fans kicked on loudly. Stayed on even after shutting the vehicle off. Vehicle is a 2024 with only 28,639 miles on it. Upper radiator hose was leaking and would not seal. Took to dealership for repair and replacement. Was informed it was the 3rd chevy Colorado this week with this issue! was stunned. Further internet research found a staggering number of forum posts with this same issue. This is a recall-worthy issue at this point. Please consider issuing a recall based on the safety issues this may pose if engines seize or overheat as well as the sheer number of the same reported incidents.

On or about 02/09/2026, the vehicle experienced a catastrophic failure directly related to a known defect identified in technical service bulletin 19-na-066. The engine "sucked" in the oil filter due to a poor design on gm's part. The stand pipe was not present apparently, and must have broken off at some point. This bulletin acknowledges an issue affecting this vehicle platform. This should have been recalled to address this engineering flaw that gm acknowledged in their TSB. Despite multiple attempts and ongoing communication with authorized representatives to have the vehicles engine replaced under an extended warranty, the vehicle was inoperable and unusable, causing significant financial hardship. I owned the vehicle for approximately 5 months and had the vehicle in the shop multiple times for other repair issues that were known per forums from other owners of this model/year of vehicle. I have exhausted all reasonable efforts to resolve this matter through dealership, gm customer service channels, and gm's executive team without satisfactory resolution. As a direct result of this defect and resulting failure, I have incurred the following damages: loss of use of the vehicle ($24,578 purchase price on 09/20/2025) rental and alternative transportation expenses ($90. 58 rental vehicle from 02/12/2026 - 02/14/2026) diminished vehicle value ($24,578 - $12,000 (selling price) = $12,578) out-of-pocket diagnostic and related expenses ($2,036. 50) total loss and seeking reimbursement: $14,705. 08.

My 2023 Chevrolet Colorado (2. 7l, approx. 49,000 miles) experiences sudden, intermittent loss of motive power involving the 8-speed automatic transmission. The transmission sets codes and the vehicle drops into limp mode, capped at roughly 45 mph, without warning. The most dangerous symptom is a total loss of acceleration from a stop, especially on inclines — pressing the accelerator produces no response. On one occasion, stopped on a slight incline, the vehicle rolled backward toward the car behind me when it failed to move forward on accelerator input. I narrowly avoided a collision. On a separate occasion, after pressing the accelerator with no response, the vehicle then suddenly lurched forward into cross traffic; repeated presses produced inconsistent, delayed engagement, nearly causing a collision. To climb inclines I now have to hold the brake while applying throttle and slowly release the brake to prevent rollback. These are unpredictable loss-of-control events that create a serious crash risk in traffic. I believe this relates to a known issue affecting the gm 8-speed automatic transmission. The vehicle is currently at a gm dealer and I have an open gm customer care case. No crash, fire, or injury has occurred yet, but two near-collisions have.

The truck has 28,000 miles and has been only driven for commuting on interstate conditions. While traveling on an 80 mile commute, I experienced complete engine failure while traveling at 75 mph (the posted speed limit is 80). As the engine failed, I was placed in a dangerous position as there is no pull-off and traffic was heavy. I was stranded in winter conditions with no ability to heat or stay warm. Onstar assisted with a tow to the closest dealership which was ressler chevy in bozeman, mt. The results of the inspection indicated a failed crank shaft, hole from internal debris in the engine block, and the engine seized. This has resulted in a engine replacement. When asked, this has been an ongoing problem with the 2. 7 engine yet there is no recall and the fix is to replace it with another 2. 7 with no fix to the issues. This truck has received all required maintenance through chevy dealerships and has no upgrades or changes from the manufacturer settings when purchased a year ago. There were no signs, symptoms, or warmings prior to the engine failure.

Since Friday, February 23rd 2026 when my 2023 chevy Colorado first start blowing oil out of the oil pan. Almost 5 qts total was lost when it arrived at the dealership. Truck was out of service from Friday until the following Wednesday, January 28th. The truck was picked up and taken on a drive out to (January 29th, 2026) waverly, KS from my hometown of prairie village, KS about 70 miles. On the way back home the truck went into safe mode at highway speeds. Lost all acceleration and barely made it off the side of the road before getting hit. Truck went back to dealership after being towed 70 miles. Where it was kept until Friday, February 6th. During this time at the dealership, they thought the problem was fixed, where again blew out all the oil while driving. Finally received the truck back. Check engine lights were still on but truck was holding oil and driving decent. Truck was doing fine until Monday February 16th. I was at a job and was driving home to finish the day. Again on the highway at highway speeds, truck goes into safe mode and limp it to gas station to again be empty on oil. It is still sitting there. Just last January the truck needed a new transmission at 48,000 miles and at the same time a wirinig harness for the back-up camera needed replaced. Alot of things have been going wrong with this truck to be so new. It has cost me alot of out of pocket expenses.

There is a coolant leak from the hoses stemming to the thermostat housing. This has been commonly reported amongst the same vehicles across the country. No damage to the hoses and no accidents to trigger leak. No light triggered. Just leaks visibly under the car.

See all problems of the 2021 Chevrolet Colorado 🔎.

When I try to accelerate some times my truck doesn’t go. It’s like it’s not even in drive. The check engine light is on and the dealership that I bought it from told me just to drive it because they don’t have a loaner vehicle at this time. That it won’t hurt the vehicle to drive but it’s unsafe to drive. I step on the gas and it doesn’t go. I could be hit if I’m trying to move when in traffic. Also my truck only had 5200 miles on it when this started and I’ve only had it since 16 July 2025.

See all problems of the 2025 Chevrolet Colorado 🔎.

Vacuum pump busted as shown in photos. Once that busted it sent metal shrapnel into the engine which broke a piece of the cam shaft into bits. There were metal fragments that had to be meticulously cleaned out of my engine block. The loss of vacuum seal caused me to lose brakes while driving in stop and go traffic on the highway.

See all problems of the 2016 Chevrolet Colorado 🔎.

The contact owns a 2015 Chevrolet Colorado. The contact stated that while driving 50 mph and depressing the accelerator pedal, the vehicle failed to respond as intended. No warning light was illuminated. The contact stated that several seconds later, the vehicle started to work as intended. A dealer was contacted. The vehicle was taken to the dealer, where it was diagnosed, and determined that the oil pressure control valve needed to be replaced. The vehicle was not repaired. The contact stated that the failure had occurred five times. The manufacturer was not notified of the failure. The approximate failure mileage was 150,000.

Visibly observed antifreeze / coolant leaking from top radiator hose where it connects to the radiator. Dealer replaced upper radiator o-ring but it's still leaking. At 17000 miles a service brake warning message showed up on information screen. Front brake rotors are warped. Dealer states normal wear on front brakes. Also the dealership stated the front left inner brake pad was down to 2mm of pad left. Wanted over $420 to turn rotors and replace pads. I inquired why the left front pads were worn so much than the right side. They stated this was normal!.

Vehicle: 2023 Chevrolet Colorado crew cab 4wd, VIN: [xxx] , mileage: 52,877. Recurrent failure in the cooling system and engine/transmission, affecting safety and use. Check engine light comes on and off intermittently, code p30c5 (coolant flow low). The coolant pump was replaced under warranty on March 20, 2025, at leson Chevrolet (harvey, la) with 26,621 miles (attached invoice), but the same issue persists 9 months later with "engine and transmission system" alert in mychevrolet app. This is the 5th failed repair for the same defect since purchase (August 2023). Previous repairs include transmission wiring/sensor (January 2024) and traction control/abs (December 2023). The vehicle is unsafe for daily 100-mile commute. Request investigation for potential recall. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

In December 2025 I was driving my 2022 chevy Colorado with 2. 5 liter all of a sudden with no prior warning or lights I have an extremely hard brake pedal could barely stop I wasnt far from home when I pulled into drive I left it running to check brake fluid saw some smoke . I pop hood and saw brake fluid full but smoke coming from the back of motor I couldn't tell where so I walked around to look underneath and saw oil all over. I shut engine off and had towed to chevy dealership diagnosis vacuum pump failure with engine damage.

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.

The engine coolant temperature gauge is stuck at approximately 160•f. Cooling fans are running at high speed constantly. The thermostat is stuck in the open position. The vehicle is less than 100,000 miles. There is a “special coverage bulletin n242484760” that has indicated the issue is occurring regularly with my type of vehicle but my specific VIN is excluded due to misplaced parameters. The part is readily available at the dealership in which we are getting the part fixed because so many vehicles of my make and model are having this issue. The cost of the repair will be $1,200 and will be out of pocket because my VIN is excluded but clearly affected by the same faulty system for the coolant. This is a mistake as my vehicle is have the exact same issue as all of the others “covered” in the special coverage. We are seeking an appeal and want to file a complaint that my vehicle is excluded and will have to pay $1,200 where other customers will not be required to do so.

Ecm engine control module tcm transmission range sensor tcm transmission control module while driving in a 45 mph speed zone in heavy traffic, the vehicle suddenly lost power and abruptly slowed down causing a number of other vehicles to have to break and swerve . Problem confirmed through onstar diagnosis as of this date, the gm dealer has not confirmed the problem. No other inspections have been confirmed. There were no warnings prior to the event.