S10/T10 P/U 2WD V6-262 4.3L VIN W CPI (1992)
Muffler: All Technical Service Bulletins
Exhaust - Noise/Growl From Muffler
Number:
92-108-6F
Section:
6F
Date:
FEB. 1992
Corporate Bulletin No.: 166606
ASE No.: A1,A8
Subject:
NOISE/GROWL FROM MUFFLER
Model and Year:
1992 S/T 4-DOOR TRUCKS WITH 4.3L TBI ENGINE
Some owners of 1992 S/T four door utility vehicles with a 4.3L TBI engine (VIN code Z) built between the VIN breakpoints listed below may
experience loud or noisy mufflers. This is due to the muffler's tuning tube being built out of manufacturers specifications. To correct this condition,
replacement of the muffler is required.
VEHICLES INVOLVED:
VIN
From SOP 1992 to N2113412
SERVICE PROCEDURE:
Removing Exhaust Parts
CAUTION: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components
could result in serious personal injury
Using a penetrating oil on the threads of U-bolts can assist in the removal of the exhaust components.
Installing Exhaust Parts
When installing a new muffler and tailpipe, on any model, check for proper alignment. Rattles and noise vibrations in the exhaust system are usually
caused by a misalignment of parts. When aligning the system, leave all bolts or nuts loose until all parts are properly aligned, then tighten working from
the front to rear. Exhaust system hangers, hanger brackets, and clamps which are damaged should be replaced to maintain exhaust system alignment.
Refer to S/T Service Manual section 6F Exhaust System for additional information.
SERVICE PARTS INFORMATION
Part Number
Description
15662525
Muffler
15662531
Pipe Assembly
15595048
Clamp
Parts are currently available from GMSPO.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
Labor Operation:
L2584
Use applicable labor time guide for labor hours.