PI0969

File in Section:
Bulletin No.:
Service Bulletin
Date:
PI0969
May, 2013
PRELIMINARY INFORMATION
Subject:
High Oil Pressure on Startup After Engine Replacement
Models:
1996-2002 Chevrolet Pickups and Vans
1996-2002 GMC Pickups and Vans
5.7L Engine (RPO L31)
5.7L Engine (RPO ZZ4 – GM Performance Parts Engine Only)
with Package Date Between 13058 and 13066
Condition/Concern
Some customers and/or technicians may comment on high oil pressure on initial startup. Oil pressure may exceed
100 psi. This high oil pressure can swell the oil filter can.
The oil pump to pickup tube attachment may have been made with the wrong locking material. The material can get
into the oil pressure relief valve and cause it to stick shut, driving the oil pressure high.
Recommendation/Instructions
3417939
Example of Package date:
(1) Year – 13
(2) Day – 087
Technicians should replace the oil pump when servicing these engines either installed in vehicles or prior to engine
installation.
Replace the oil pump on the following engines:
Engine Part Number
Description
24502609
L31 Engine
12530282
L31 Engine
12530283
ZZ4 Engine
Parts Information
Part Number
Description
93442037
PUMP, OIL
12550042
SCREEN, ASO/PMP
10046007
BOLT, PUMP & SC
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
4066078
Oil Pump Replacement (Engine Not Installed in Vehicle)
1.5 hrs
4066070
Oil Pump Replacement (Engine Installed in Vehicle)
Use Published
Labor
Operation Time