B Pillar Cab Mount Cushion Area - Rattles

9216chevy12

Number: 91-375-10

Section: 10

Date: JULY 1991

Corporate Bulletin No.: 161602


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


Model and Year:
1991 C/K TRUCKS

FIGURE 1:

FIGURE 2:

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).

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 ASM 1GCDC14K0MZ168782

Oshawa ASM 2GCHC39N1M1191836

Pontiac East ASM 1GBGC24J4ME175532

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.