Grand AM L4-121 2.0L (1988)
Vacuum Brake Booster: Technical Service Bulletins
Brakes - Selected Models with Revised Components
Bulletin Number:
88-5-3
Reference Number:
875001
Publish Date:
11/87
Subject:
1988 BRAKE SYSTEM CHANGES
Models
Affected:
1988 SUNBIRD AND GRAND AM
1988 Sunbird and Grand Am vehicles produced beginning with the following vehicle identification numbers (VIN) at the assembly plants listed will be
equipped with a different brake master cylinder, brake booster assembly and brake caliper assemblies.
Assembly Plant
Model
VIN Breakpoint
Lansing (C)
Grand Am
1G2NV14U9JC637905
Lordstown (7)
Sunbird
1G2JB51K4J7506603
The changes to the brake system were incorporated to provide an improved pedal feel and increased booster assist on initial brake apply.
PARTS USAGE
The new caliper part numbers listed below must be used to service ALL 1988 Sunbird and Grand Am models.
The NEW brake booster and master cylinder part numbers listed in this bulletin MUST be used to service only those Sunbird and Grand Am models
produced beginning with the VIN breakpoints provided.
NOTICE:
Vehicles built prior to the VIN breakpoints MUST be serviced with the old brake booster and brake master cylinder part numbers
listed in this bulletin. Mixing the new booster and master cylinder parts with old parts on early built (prior to VIN breakpoints)
vehicles may result in a brake application requiring increased pedal travel to stop the car.
PARTS INFORMATION:
1988 NEW
1988 OLD
PART NUMBER
PART NUMBER
Caliper
18015752 (Left)
18011667 (Left)
18015753 (Right)
18011668 (Right)
Booster
18015498
(Code NT)
18013875
(Code LF)
Master Cylinder
18015760
(Code NT)
18014370
(Code DL)