K 2500 Truck 4WD V6-262 4.3L VIN Z (1992)
Brake Rotor/Disc: All Technical Service Bulletins
Steering - Noise At Full Lock
Number:
92-252A-3C
Section:
3C
Date:
SEPT. 1992
Corporate Bulletin No.:
863301R
ASE No.:
A4
Subject:
NOISE AT FULL STEERING LOCK
Model and Year:
1988 AND 1992 C TRUCKS
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 92-252-3C, DATED AUGUST, 1992. VIN
BREAKPOINTS HAVE BEEN CORRECTED. ALL COPIES OF 92-252-3C SHOULD BE DISCARDED.
Some owners of 1988 and 1992 C trucks may experience a condition where the brake rotor comes in contact with the lower control arm. This occurs only
when the steering wheel is turned to the full lock position and most often on left hand turns. The interference between the lower control arm and brake
rotor will cause a screeching noise as metal rubs metal. A gouge on the inner brake rotor is evidence that an interference condition does exist.
On vehicles with this condition, the nose area of the lower control arm should be ground away to provide additional clearance. If a gouge is found on the
inside of the brake rotor, then replacement of the rotor will be necessary.
Vehicles Involved:
In addition to the 1988 C1 and C2 models, certain 1992 C1 and C2 models built within the following VIN breakpoints are involved.
Plant
Beginning
Ending
Pontiac East
NE177646
NE190038
Oshawa
CEC19H6N1206608
2CCEC19K7N1221548
Fort Wayne
1GBDC14K7NZ189800
1GCEC14K7NZ194690
Janesville
None
Service Procedure
1.
Inspect brake rotor for signs of contact with the lower control arm.
2.
If a gouge is found, replacement of the brake rotor will be necessary.
3.
Siphon 2/3 of the brake fluid from the master cylinder.
4.
Remove the wheel and tire assembly
5.
Remove the brake caliper from the brake rotor. Suspend the caliper assembly with a wire hook away from the work area.
6.
Remove wheel bearing cap and nut from the spindle.
7.
Remove the brake rotor and discard if a gouge is found. Care should be used so that the outer bearing and spindle threads are not damaged. Save
the bearings.
8.
Remove the brake splash shield and gasket.
