CUSTOM CRUISE III DUST COVER ADD DRAIN HOLE IN COVER

Models: GMC Trucks with L6 Engines

The servo mounting location on L6 engines could result in water accumulating in the servo dust cover. A production change has been made to the servo, which provides a drain hose as shown in the illustration below.

If during pre-delivery inspection, it is determined that the servo cover drain hole is missing, the following procedure should be followed:

1. Remove the servo assembly from the vehicle.

2. Place the assembly on a bench with the cover in the up position, remove the servo cover screws and lift off the cover. DO NOT INVERT the servo assembly once the cover has been removed.

3. Drill a 3/16" hole through the center of "C" of the AC logo on the cover.

4. Clean the cover of drill filings.

5. Reinstall cover and screws.

6. Reinstall servo.

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.