V 2500 P/U 4WD V8-350 5.7L (1987)
Cylinder Head Gasket: Technical Service Bulletins
Engine - Updated Head Gaskets
GMC NUMBER:
88-T-35
GROUP:
6A-Engine Mechanical
DATE:
September, 1987
CORPORATE
NUMBER:
866103
SUBJECT:
NEW CYLINDER HEAD GASKETS FOR 4.3L, 5.0L AND 5.7L ENGINES
MODELS:
1987 AND PAST MODEL YEAR TRUCKS AND EARLY PRODUCTION 1988 C/K MODEL TRUCKS EQUIPPED WITH 4.3L, 5.0L
AND 5.7L ENGINES
An improved cylinder head gasket of composite construction has been released to replace the metal gasket. The new gasket has improved sealing
capabilities. The new part numbers shown below should be used for service.
Application
Cylinder Head Gasket
4.3L Truck
10066080
5.0L Truck
10066081
5.7L Truck
10066082
Engines manufactured after the following build date codes were built with the new composite gasket.
Engine
Engine
Build Date
Date Codes
4.3L
May 15, 1987
T0515XXX
5.0L
July 1, 1987
V0701XXX
K0701XXX
5.7L
July 1, 1987
V0701XXX
K0701XXX
FIGURE 1
Engine date codes aye stamped on a pad at the block to passenger side cylinder head parting line, see Figure No. 1. The built date codes may be found in
this area and appear as shown in the following example:
T1202ABC
