Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0604-INTERNAL TCM.
PCM - INTERNAL ERROR
TEST ACTION APPLICABILITY
1 Using the schematics as a guide, inspect the wiring and connectors. Repair as
necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.
Replace the Powertrain Control Module. WITH THE DRBIIIt
PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR.
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
Do you have SKIM? Even if you just get a used PCM a dealer should be able to program it to your current keys and SKIM module. They'll be able to get the PIN from your VIN, etc. Whether they'll do it or not is another matter! Most want to sell you a new PCM for big $$$. Give the dealer a call and see if they'll do it and how much it'll cost.