GENERAL MOTORS issued a recall on the C SERIES and K SERIES models

On certain vehicles, the transmission fluid may be forced out of the vent tube due to heat generation in the transmission caused by trailering heavy loads at high speeds or high-load/off road use. If the vented transmission fluid comes in contact with the catalytic converter, the fluid could ignite resulting in a vehicle fire. Correction: Dealers will install a longer transmission vent hose routed to the left side of the vehicle.