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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 504 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2559: BCM Detects A Open When A Ground Is Expected >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. 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. 3. Tests for an open in the courtesy lamps ground circuit of the BCM that provides the ground path for the interior lamps control circuit.
Fig 1: DTC B2559 Diagnostic Table
G01830502Courtesy of GENERAL MOTORS CORP.
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