PIP5108

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIP5108
April, 2013
PRELIMINARY INFORMATION
Subject:
Engine Whine Noise At 1500-1800 RPM
Models:
2011-2013 Cadillac Escalade Models
2011-2013 Chevrolet Silverado, Suburban, Tahoe
2011-2013 GMC Sierra, Yukon
With any of the following V8 Engine RPO Codes: 5.3L, 6.2L LC9, LMG, LH9, L94, L9H
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
You may receive a vehicle with a concern of an audible engine whine noise at 1500-1800 rpm.
This noise can be heard inside vehicle at or near the right side of dash/bulkhead area.
Recommendation/Instructions
If this is encountered: follow the steps below.
1. Verify the coolant level
2. Remove the serpentine belt to verify the noise goes away
3. Replace the thermostat and retest
4. If replacing the thermostat does not repair the audible engine whine noise at 1500-1800 rpm, replace the
water pump
Labor Operation
J3500
Description
Labor Time
Engine Coolant Thermostat Replacement
Use Published Labor
Operation Time
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.