LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2000 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - Diesel >> Programming >> Powertrain Control Module Relearn
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Powertrain Control Module Relearn

  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.
scientia non olet · About LEMON Manuals