I am not sure if they did PATS programming when the used another PCM (several years ago). I replaced the transceiver myself and it didn't make any difference in operation. Thanks VERY much for your feedback. A bit more background -- After I do the warm up and successfully start the truck if it...

Is anyone VERY familiar with this issue. Have spent too much time and money trying to resolve. ISSUE: Have to turn ignition to ACC and wait until (cluster) odometer warms (IAT). through random number resolves low order digits to high order digits to complete SCP then truck will start. Wait time...