Coolant leak observed at the upper radiator hose quick-connect fitting. The leak appears to originate from the internal seal at the radiator inlet connection. This issue developed without warning and is consistent with a known defect in the radiator hose seal design used in 2023 GMC Canyon vehicles. Vehicle experienced coolant loss and visible residue at the connection point. No visible external damage to the radiator or hose assembly was observed. GM has issued a Special Coverage program for similar radiator inlet hose seal failures in related vehicles using the same component design. Concern is that this defect may lead to coolant loss and potential engine overheating if not addressed.
- NHTSA ID
- 11733035
- Incident
- Mar 2, 2026
The upper radiator hose on some huge percentage of these trucks fail (mine has failed at just over 37K miles). You can check the Colorado Chevy and GMC Canyon forums, youtube, Facebook, 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 that I am responsible for the repair. 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.
- NHTSA ID
- 11720437
- Incident
- Jan 15, 2026
Top radiator hose is leaking coolant. Radiator hose O ring appears to be faulty.
- NHTSA ID
- 11718457
- Incident
- Sep 1, 2025
Upper radiator hose gasket leaks at connection point to radiator and no gasket replacement part. GMC forces you to buy entire hose
- NHTSA ID
- 11718399
- Incident
- Feb 5, 2025
Upper radiator hose is leaking
- NHTSA ID
- 11711891
- Incident
- Jan 9, 2026
Noticed a coolant leak on drivers side and took to dealership was told was the upper radiator hose but was unable to make repairs due to national backorder and only suggestion was to drive until parts come in and keep a check on the coolant level, My truck only has 28,708 miles and shouldn't have to keep an eye on coolant level I feel that is very unsafe
- NHTSA ID
- 11705901
- Incident
- Dec 16, 2025
The upper radiator hose on a significant number of these trucks is failing prematurely. In my case, the failure occurred at just over 35,000 miles. Numerous reports on owner forums (such as the Colorado Chevy / GMC Canyon forum), YouTube, and other platforms document the same issue, indicating this is not an isolated incident but a widespread defect. Because this hose is part of the cooling system, its failure can quickly lead to engine overheating and potentially catastrophic engine damage. The root cause appears to be an engineering flaw in the sealing method: GM uses a rubber seal instead of a durable, high-quality o‑ring to connect the upper hose to the radiator. Despite the seriousness of this defect, my local GMC dealer informed me that—since it is not currently a recall item—they could only schedule service for the following week, requiring me to leave the truck with them for 7–10 days before repairs would be completed. This is unreasonable for consumers who rely on these vehicles daily. Given the safety implications and the potential for engine failure, this issue warrants immediate attention. It should be classified as a recall item. Thousands of examples are already documented online, and GM’s own repair data would likely reveal thousands more instances of this same failure.
- NHTSA ID
- 11703623
- Incident
- Dec 2, 2025
Upper Radiator hose O ring defect Causing all 2023+ Chevorlet Colorados and 2023+ GMC to leak coolant in a brand new truck
- NHTSA ID
- 11694003
- Incident
- Oct 14, 2025
EnginePowertrain (other)
Filed Dec 24, 2024
Our 2023 Canyon AT4 we bought on [XXX] had the same problem as this current VIN number of the 2023 Canyon ( Covert GMC in Bee Caves tx bought back the first 2023 Canyon due to this same exact transmission problem. The vehicle I’m complaining about that was replaced by Covert GMC in Bee Caves Texas on [XXX] still has a unsafe issue with the transmission. I’m [XXX] and I am [XXX]. Almost every time I pull into a [XXX] parking spot, from right or left approach, this vehicle lunges as I get close to the sign post. it occurs at red lights occasionally. This current replacement vehicle has been in for warranty several time .. only to the Same excuse that they can’t duplicate. Common denials Don not fix the safety issue with this truck. It’s dangerous INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- NHTSA ID
- 11632309
- Incident
- Dec 20, 2024
EnginePowertrain (other)
Filed Jan 9, 2024
While slowly driving, like when parking or trying to park vehicle in garage, it will randomly surge when almost at complete stop forcing vehicle to lunge forward requiring operator to apply quick additional firm braking. It almost feels like vehicle is creeping in 2nd gear and decides to downshift into 1st gear just before coming to a stop and engine applies slightly more throttle. I have almost hit garage wall and other vehicles in parking lots due to this issue. Again, it is intermittent but is alarming when happens. I have not had vehicle in for repairs yet but concerns dealer will not be able to duplicate. No warning lights on dash for this issue.
- NHTSA ID
- 11564448
- Incident
- Oct 1, 2023
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.