B Pillar Cab Mount - Rattle Noise

91chevy24

GMC NUMBER: 91-10-126

GROUP: 10 Body Section

DATE: July, 1991


CORPORATE NUMBER: 161602


SUBJECT: RATTLE FROM "B" PILLAR CAB MOUNT CUSHION AREA

MODELS: 1991 C/K TRUCKS

Figure 1:

Some 1991 C/K trucks may experience a rattle from "B" pillar cab mount cushion area.

SERVICE PROCEDURE:
To correct this condition it is necessary to increase torque on the cab body and radiator support mounts to the following revised torque specifications.

1. Body mount bolt (P/N 15611432) from 60-90 N-m (44-66 lbs.ft.) to 75-95 N-m (55-70 lbs.ft.) (Figure 1).

Figure 2:

2. Radiator support mount (P/N 15538569) from 40-55 N-m (30-40 lbs.ft.) to 50-63 N-m (37-46 lbs.ft.) (Figure 2).


The revised torque specifications started with the following VIN breakpoints:

Ft. Wayne Chevrolet: 1GCDC14K0MZ168782
ASM GMC: 1GTDC14K7MZ519221
Oshawa Chevrolet: 2GCHC39N1M1191836
ASM GMC 2GTEC19KXM1532020
Pontiac East Chevrolet: 1GBGC24J4ME175532
ASM GMC: 1GTGK24K9ME527656

WARRANTY INFORMATION:
For vehicles repaired under warranty use:

Labor Operation: T7291

Labor Time: 0.2 hrs.

Note: Labor Operation is coded to base vehicle warranty coverage in the warranty system.