IPC Engine Hour Meter Resets - keywords cluster DIC display hour meter intermittent start up

This PI was superseded to update Recommendation/Instructions. Please discard PIT4368.

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

Some owners may comment of the ipc engine hour meter resetting. This concern may be very intermittent and normally occurs at key up and/or start up.

GM Engineering is aware of this concern and working on a correction. At this time there has been varying success repairing this concern with the following information:

1. Check the battery/s with the Midtronic's battery tester and also perform a load test using a Vat40 or similar load tester to make sure the battery/s are in good condition. We have found in some cases a weak battery could cause this concern, this step is very important on vehicles with the 6.6L Diesel Engine where both batteries are used for cranking the engine.
2. Check the battery cables and make sure all connections are clean and tight.
3. Check the IPC powers and grounds (G200, G203, G100, G110 and the braided ground strap between the engine and cowl G104 and G107) connections and make sure they are clean and tight.
4. If the IPC has not been replaced, replace the IPC.

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.