Diagnostic Aids

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Diagnostic Aids
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  • Inspect the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.
  • The Snapshot function on the scan tool can help find an intermittent DTC.
  • Possible causes for this DTC are the following conditions:
    • One of the steering wheel position sensor inputs are open, shorted to ground, or shorted to battery.
    • Internal steering angle sensor malfunction
    • Noise on the steering wheel position signal circuits
    • Yaw and lateral acceleration sensor malfunction causing drifting signal outputs
    • Internal EBCM malfunction
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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.