2002 GMC DENALI User Comment / Complaint

Failure of transmission cooler, which is inside the radiator, caused transmission fluid and anti-freeze to mix and flow through engine and transmission. the transmission was ruined as a result. the repair involved replacing the radiator, all engine hoses, rebuilding the transmission, flushing engine and replacing fluids at a total cost of $3047. this vehicle has had exceptional care and all maintenance was performed on schedule. the vehicle, a suv was never used off road or to pull a trailer, and has 74000 miles. there was no way to prevent the problem as the cooler in inside the radiator and cannot be serviced. the result of this is early failure of the transmission and the need to replace several engine components that were impacted. fortunately this was detected before the transmission failed and caused a breakdown or accident. other incidences of this same problem were noted upon internet research.