gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

All Other Service Bulletins for Brake Light Switch:|86148 > < A/T - No Engine Braking In Drive 2 (D2) Selection
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Figure No. 2 - Valve Body

SERVICE PARTS INFORMATION: (Figure 2)

Service Part No.

Part Description

8626883

Piston-Front Accumulator (303)

This part is currently available from GMSPO.

IMPORTANT:

The plastic Front Accumulator Piston (8629080) should be replaced if found in any 1978-1988 Control Valve Assembly (049).

SERVICE MANUAL REFERENCE:

Refer to the Unit Repair Section of the appropriate Service Manual for proper replacement procedures. For replacement performed under warranty, use
Labor Operation K 6560.

All Other Service Bulletins for Brake Light Switch:|86148 > < A/T - No Engine Braking In Drive 2 (D2) Selection