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Home >> GMC >> 2003 >> Sierra 2500 HD, 4D Pickup Extra Cab, 6.6 1, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 6.6L >> Fuel Systems >> Glow Plug System Diagnosis >> Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic procedures.

  1. 2  - This step will make sure there are no other DTCs stored that will affect the operation of the glow plug system.
  2. 3  - This step will check each glow plug for an open.
  3. 4  - This step will check each glow plug feed circuit for an open.