For 1990-2009 cars

# Incorrect Odometer Reading After BCM Replacement - keywords calibration inaccurate IPC mileage program stall

Subject: | Incorrect Odometer reading After BCM Replacement

Models: | 2005-2008 Chevrolet Cobalt

| 2007-2008 Pontiac G5

| 2005-2006 Pontiac Pursuit

| 2003-2006 Saturn ION

This PI was superseded to update model years and Recommendation/Instructions. Please discard PIC3843A.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

A technician may comment the he has incorrect odometer reading after a BCM replacement and reprogramming procedure.

### Recommendation/Instructions:

After replacing a BCM, disconnect the IPC prior to programming the new BCM. If the IPC is not disconnected it may validate the current mileage (incorrect in this case) with the ECM and self-populate the BCM with the incorrect mileage.

Disconnect IPC from BCM before programming. This will force the BCM to prompt the technician to enter the mileage during programming. If the incorrect mileage was transferred to the IPC, try programming again with the IPC disconnected.

Important: If this doesn't work the BCM will need to be replaced again.

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.