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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1419 (Door System, Mirror System & Window System) >> Diagnostic Information & Procedures >> DTC B3137 or B3138 >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2.  Listen for an audible click when the door lock relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. 3.  Verifies that the body control module (BCM) is providing voltage to the door lock relay.
  3. 4.  Tests for an open in the ground circuit to the door lock relay.
  4. 5.  Tests if voltage is constantly being applied to the door lock relay.
  5. 12.  After replacement of the BCM you must calibrate the new module for proper operation.
Fig 1: DTC B3137 or B3138 Diagnostic Table
G02506668Courtesy of GENERAL MOTORS CORP.