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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 810 (Transfer Case - BW 4482-Nr4) >> Diagnostic Information and Procedures >> Service Indicator Inoperative >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

The Service 4WD indicator is located in the instrument panel cluster (IPC), and shares the common power and ground of the IPC. The transfer case shift control module controls the Service indicator lamp by sending the IPC a Class 2 message. This lamp may be controlled with the scan tool using the IPC device controls.

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