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Hello, mst shops would probably charge a couple of hours of diagnostic time to test the powers and grounds and any codes associated with a non communicating PCM. To replace the PCM they will probably charge 1 to 2 hours to replace and reprogram the PCM and to reprogram 2 PATS keys to the vehicle so the truck will start. The question is if it is the correct diagnosis and why the PCM failed. If it had an aftermarket tuner or any modifications installed which caused a failure or issue with an aftermarket FICM which was defective.
The dealer way to do it is to install a new blank PCM and Reflash it. You can purchase preprogrammed PCM;s or send your out and have it repaired. It would be a plug and play, but you may still need to reprogram 2 pats keys in order for it to run.
These are the ignition keys. There is a factory security chip in them so the truck will not start unless it recognizes the secuirty chip. Whenever the PCM is replaced, they have to be reprogrammed to the vehicle, it is a protocol operation. You must have 2 ignition keys in order to program them. So if you only have one key(if equipped with PATS a red theft indicator in the dash) you will need 2.
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