Cargo Door Ajar Indicator Always On

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.

Step	Action	Yes	No
Schematic Reference: Body Rear End Schematics
1	Did you perform the Body Rear End Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Body Rear End
2	Close the cargo doors or the lift glass. Is the cargo door ajar indicator illuminated?	Go to Step 3	Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
3	Connect a scan tool. Turn the ignition ON, with the engine OFF. With a scan tool command the cargo door ajar indicator ON and OFF. Does the indicator turn on and off with each command?	Go to Step 4	Go to Step 11
4	Connect a scan tool. Turn the ignition ON with the engine OFF With a scan tool observe the cargo door ajar indicator or the lift glass ajar indicator parameter. Does the scan tool display inactive?	Go to Step 7	Go to Step 5
5	Disconnect the cargo door or lift glass ajar switches one at a time. After each switch is disconnected observe the switch status on the scan tool. Does the scan tool display inactive for any of the switches?	Go to Step 8	Go to Step 6
6	Test the cargo door or lift glass ajar switch(s) signal circuit for a short to ground. Refer to CIRCUIT TESTING and TESTING FOR SHORT TO GROUND . Did you find and correct the condition?	Go to Step 12	Go to Step 7
7	Inspect for poor connections at the harness connector of the body control module (BCM). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	Go to Step 12	Go to Step 9
8	Inspect for poor connections at the harness connector of the cargo door or lift glass ajar switch(s). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	Go to Step 12	Go to Step 10
9	IMPORTANT: When replacing the BCM refer to BODY CONTROL MODULE (BCM) PROGRAMMING/RPO CONFIGURATION . Replace the body control module (BCM). Refer to BODY CONTROL MODULE REPLACEMENT .Did you complete the replacement?	Go to Step 12	-
10	Replace the faulty cargo door or lift glass ajar switch(s). Refer to Latch Replacement - Liftgate or Latch Replacement - Door (Cargo Door Lower) or Latch Replacement - Door (Cargo Door Upper) . Did you complete the replacement?	Go to Step 12	-
11	Replace the instrument panel cluster. Refer to INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT . Did you complete the replacement?	Go to Step 12	-
12	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3