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2001 GMC YUKON XL 2500
6.0L V8 Vortec•4WD•AUTOMATIC•gas
9 active safety recalls on this vehicle — view recalls
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Repairs0Labor492Torque1427Fluid10DTC1767Battery1Maintenance0Recalls9
B1380moderate severityBody

Ignition 1 Circuit Fault

on 2001 GMC Yukon XL 2500 6.0L V8 Vortec · 4WD

What this code means

The module detected a fault on the ignition 1 switched power circuit. Commonly caused by a failing ignition switch or open wiring.

Symptoms

  • No-start condition
  • Intermittent module power
  • Warning lights on

Common causes

  • Faulty ignition switch
  • Blown fuse or relay
  • Open or shorted wiring
  • Loose connector

Diagnostic steps

  1. Check ignition 1 fuse and relay
  2. Verify voltage at circuit in run position
  3. Test ignition switch continuity
  4. Repair wiring or replace switch
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