Trouble Shooting

1999 GMC Forward Control 5.7 R, AutomaticSECTION Trouble Shooting
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet Chevy Express, and 2001 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.

Check PWR ACCY fuse (25-amp) located in instrument panel fuse block. Ensure all electrical connectors, circuits and grounds are okay. Operate door locks using second transmitter. If system operates, replace battery in first transmitter. Ensure transmitter battery terminals are clean and making good contact. Ensure power door locks system is operational. See appropriate POWER DOOR LOCKS article. If any problems are found, repair as necessary. If no problems are found, diagnose by symptom. See SYMPTOM INDEXΒ  table under SYSTEM TESTS.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.