Two problems related to automatic transmission cooler have been reported for the 2004 Chevrolet Trailblazer. The most recently reported issues are listed below.
The transmission cooling lines corroded and caused a transmission fluid leak. The engine rpms increased and the vehicle lost power while going down interstate 86. When the fluid leaked out of the transmission cooling lines, it sprayed all over the exhaust pipes, which caused a severe fire hazard. Due to the loss of transmission fluid, it cased significant damage to the transmission internals.
The vehicle operated normally until part failure. Transmission pressure cooling line connector not in place properly,caused automatic transmission fluid to spray on hot exhuast manifold, starting a major engine fire. The vehicle was inspected by general motors adjuster, and considered a total loss. No repairs were attempted.