gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

All Other Service Bulletins for Dashboard / Instrument Panel: > < Interior - Tapping Noise In Corner of Dash|Page 6353
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Water Pump: All Technical Service Bulletins
Cooling System - Water Pump/Seal Leaks

GMC NUMBER:

88-T-137

GROUP:

6B - Engine Cooling

DATE:

August, 1988

CORPORATE
NUMBER:

836206R

SUBJECT:

WATER PUMP/SEAL LEAKS

MODELS:

1987-88 S/T MODELS WITH 2.8L ENGINE (VIN CODE R)

Some 1987-88 S/T trucks equipped with a 2.8L engine (VIN Code R) may exhibit a coolant leak from the water pump weep hole while the engine is
running. If customer comments relative to coolant leaks are received and the water pump is diagnosed as the problem, then install a new water pump
assembly which incorporates a new design seal. The new
design pump has the same overall appearance as the old part.

WATER PUMP AND GASKET ASSEMBLY

MODEL

SERVICE PART NUMBER

S/T Truck

10120943

For vehicles repaired under warranty, use:

Labor Op:

J3480

Labor Time:

1.0 hr.

All Other Service Bulletins for Dashboard / Instrument Panel: > < Interior - Tapping Noise In Corner of Dash|Page 6353