Impala V8-5.3L (2008)
Axle Nut: All Technical Service Bulletins
Steering - Growl Type Noise Coming from Front of Vehicle
TECHNICAL
Bulletin No.: 11-03-08-001
Date: April 14, 2011
Subject: Growl Type Noise Coming from Front of Vehicle
Models:
2006-2011 Chevrolet Impala (Including Police Vehicles)
Condition
Some customers may comment on a growl type noise coming from the front of the vehicle at speeds between 32 and 80 km/h (20 and 50 mph).
Cause
This condition may be caused by loss of preload on the front wheel bearings.
Correction
Important
DO NOT replace the front wheel bearing and hub for this condition.
To diagnose the noise, retorque the existing front axle shaft nut to 220 Nm (162 lb ft) and test drive the vehicle. If the noise is eliminated, replace both
front axle shaft nuts with GM P/N 10257766 and tighten to the specification indicated below. On vehicles equipped with the police package (RPOs 9C1
or 9C3), add an additional Nord-Lock washer, GM P/N 20861489 between the hub and nut as shown in the illustration below.
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
