Rainier AWD L6-4.2L VIN S (2005)
Engine Control Module: Customer Interest
Instruments - Erratic Speedometer Operation
Bulletin No.: 07-08-49-027
Date: December 04, 2007
TECHNICAL
Subject:
Erratic Speedometer Operation Or Speedometer Needle Shakes Above 60 mph (96 km/h) (Repair Poor Connection At Ground G108)
Models:
2004-2007 Buick Rainier
2002-2008 Chevrolet TrailBlazer Models
2002-2008 GMC Envoy Models
2002-2004 Oldsmobile Bravada
2005-2008 Saab 9-7X
with 4.2L Engine Only (VIN S - RPO LL8)
Condition
Some customers may comment on erratic operation of the speedometer. Others may comment that the speedometer needle shakes above 96 km/h (60
mph).
Cause
This condition may be caused by a loose or poor connection at Powertrain Control Module/Engine Control Module (PCM/ECM) ground G108.
Correction
Technicians are to inspect and repair ground G108 as necessary. Refer to callout 1 in the illustration above for the location of G108. Refer to the Testing
for Intermittent Conditions and Poor Connections and the Wiring Repair procedures in SI for more information.
Warranty Information (excluding Saab U.S. Models)
