DIESEL TCC ENGAGEMENT LOW SPEED INFORMATION

Vehicles with 5.7L diesel engines and 350C transmission (Code WT - WX) may apply in third gear between 25-30 mph. The apply speed on these vehicles can be increased to approximately 42 mph by removing the tan colored governor pressure switch and replacing it with a white governor pressure switch P/N 8633363.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.