Powertrain Control Module Reprogramming

To program PCM or if program needs to be updated, see POWERTRAIN CONTROL MODULE under PROGRAMMING in SELF-DIAGNOSTICS - 5.0L & 5.7L CHEVY EXPRESS & SAVANA. After reprogramming, perform CRANKSHAFT POSITION SENSOR SYSTEM VARIATION LEARN PROCEDURE  and PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS  .