Erratic Speedometer Operation or Speedometer Needle Shakes Above 60 mph (96 km/h) (Repair Poor Connection at Ground G108)
| 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)
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time | Failure Code |
|---|---|---|---|
N6620 | Wiring And/Or Connector-Power & Grounds Distribution - Repair Or Replace | Use Published Labor Operation Time | 93 (Technical Service Bulletin)* |
*Please use the Failure Code 93 for any warranty claims submitted using this bulletin.
Warranty Information (Saab U.S. Models)
For vehicles repaired under warranty, use:
Labor Operation | Description | Failed Object | Fault/Reason Code | Location Code | Warranty Type | Repair/Action Code | Labor Time |
|---|---|---|---|---|---|---|---|
3714901 | Wiring And/Or Connector-Power & Grounds Distribution - Repair Or Replace | 37149 | 15 | 0 | 01 | 05 (Repair) Or 01 (Replace) | Use Published Labor Operation Time |
