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Powertrain Control Module Relearn

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2000 GMC Savana Special, 2000 GMC Savana Camper Special, 2000 GMC Savana, 2000 GMC Pickup, and 2000 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure battery is charged, ignition is on, battery/cigarette lighter and DLC connections are secure. Perform the programming procedure. Refer to up-to-date Techline terminal/equipment for instructions.
  2. Perform relearn procedures for anti-theft system. See PROGRAMMING in appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
  3. After vehicle has been programmed, operate vehicle until coolant temperature is greater than 170°F (77°C). This allows TDC offset to be programmed automatically.
  4. If PCM is only being reprogrammed, it maybe necessary to program PCM with glow plug information. See GLOW PLUG SYSTEM TYPE RELEARN .
  5. If PCM fails to reprogram, check PCM connections and check Techline terminal/equipment for latest software version. Attempt reprogramming PCM. If reprogramming fails again, replace PCM.
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