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Home >> GMC >> 2003 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls - Basic Diagnostic Procedures - 8.1L) >> Ignition Systems >> Electronic Ignition System >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The number below refers to step number on diagnostic procedure.

  1. 5 -  Monitoring misfire current counters determines if a fault is present.
  2. 12 -  A good indication that fuse is open is all off misfire current counters are incrementing on one side of engine. Inspect ignition positive voltage circuit for a grounded circuit. If fuse is open and ignition coil circuits are okay, inspect injector circuits for being grounded.

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