V 3500 P/U 4WD V8-350 5.7L VIN K TBI (1988)
Cylinder Head Gasket: Technical Service Bulletins
Engine - Improved Head Gasket
GMC NUMBER:
89-6A-121
GROUP:
6A Engine Mechanical
DATE:
December, 1989
CORPORATE NUMBER 836537R
SUBJECT:
REVISED CYLINDER HEAD GASKET
MODELS:
1987-89 C/K, R/V, S/T, M, G AND P LIGHT TRUCKS WITH 4.3L, 5.0L, AND 5.7L ENGINES (VIN CODES H, K AND Z) AND C5,
C6 MEDIUM TRUCKS WITH 5.7L (VIN CODE A) ENGINE.
THIS BULLETIN CANCELS AND REPLACES GMC TRUCK SERVICE BULLETIN 89-T- 16 TO ADD THE 1987-89 S/T AND M MODELS,
AND 4.3L ENGINE APPLICATION AND PART NUMBER.
A cylinder head gasket with improved sealing characteristics is now available for service use on all 4.3L, 5.0L and 5.7L engine applications. The
applicable part numbers are listed below:
Application
Cylinder Head Gasket P/N
4.3L Engines
10105110
5.0L Engines
10105115
5.7L Engines
10105117
Parts are currently available from GMSPO. When replacing head gaskets on vehicles under warranty, use:
Labor Ops:
J0500 - Right Bank J0501 - Left Bank J0507 - Both Banks
Refer to Labor Time Guide for applicable labor times for various models.
