Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the appropriate probe from the J 35616-A connector test adapter kit for any probing of the electrical components in this table, in order to avoid damage to the terminals.

The scan tool must display DTC B2618 as a current code before performing these diagnostics.
Perform a visual inspection for loose or poor connections at all related components. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.