Exterior Courtesy Lamp(s) Inoperative

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Open any door. Do the exterior courtesy lamps operate correctly?	Go to Testing for Electrical Intermittents	Go to Step 3
3	Do the interior courtesy lamps illuminate?	Go to Step 4	Go to Courtesy Lamps Inoperative
4	Disconnect the outside rearview (OSRV) mirror connector from the driver door switch or passenger door switch. Test for continuity between the door exterior courtesy lamp supply voltage circuit and the door exterior courtesy lamp ground circuit of the OSRV mirror connector. Refer to Testing for Continuity . Is continuity present?	Go to Step 6	Go to Step 5
5	Inspect the bulb for an open filament. Is the bulb good?	Go to Step 7	Go to Step 8
6	Inspect for poor connections at the harness connector of the driver door switch or passenger door switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 11	Go to Step 9
7	Test for a short to ground or an open in the affected door exterior courtesy lamp supply voltage circuit and inspect for poor connections at the harness connector of the OSRV mirror. Refer to Circuit Testing , Wiring Repairs , Testing for Intermittent Conditions and Poor Connections , and Connector Repairs . Did you find and correct the condition?	Go to Step 11	Go to Step 10
8	Replace the bulb. Refer to Courtesy Lamp Replacement - Exterior . Did you complete the replacement?	Go to Step 11	-
9	Replace the driver door switch or passenger door switch. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 11	-
10	Replace the OSRV mirror. Refer to Mirror Replacement - Power . Did you complete the replacement?	Go to Step 11	-
11	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3