Incorrect Odometer Reading After BCM Replacement (PIC3843E)

INCORRECT ODOMETER READING AFTER BCM REPLACEMENT

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

Brand:	Model:	Model Year:		VIN:		Engine:	Transmission:
		from	to	from	to
Chevrolet	Cobalt	2005-2010		All	All	All	All
Chevrolet	Malibu	2004-2008		All	All	All	All
Pontiac	G5	2007-2010		All	All	All	All
Pontiac	Pursuit	2005-2006		All	All	All	All
Saturn	Ion	2003-2007		All	All	All	All

Supersession Statement

This PI was superseded to update model years. Please discard PIC3843D.

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

CONDITION/CONCERN

A technician may comment that the odometer reading is incorrect after replacing BCM and performing a reprogramming event.

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.

Disconnecting the IPC from BCM before programming 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.

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.