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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C Pickup - 2WD 🢒 Body and Accessories 🢒 Doors 🢒 Door Lock/Unlock Inoperative with Transmitter - Rear

Door Lock/Unlock Inoperative with Transmitter - Rear Except Luxury

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic procedure should only be used if the cargo door unlocks with the door lock switches and is inoperative with the keyless entry transmitter.

1

Was the Keyless Entry System Check performed?

--

Go to Step 2

Go to Remote Keyless Entry System Check

2
  1. Disconnect the remote control door lock receiver connector.
  2. Connect a J 39200 DMM between cavity F and ground.

Is there battery voltage?

--

Go to Step 3

Go to Step 4

3

Replace the remote control door lock receiver. Refer to Remote Control Door Lock Receiver Replacement .

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

4

Repair open in CKT 540 (ORN) between the remote control door lock receiver and S255. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

Door Lock/Unlock Inoperative with Transmitter - Rear Luxury

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic procedure should only be used if the cargo doors unlocks with the door lock switches and is inoperative with the keyless entry transmitter.

1

Was the Keyless Entry System Check performed?

--

Go to Step 2

Go to Remote Keyless Entry System Check

2
  1. Disconnect the cargo door lock relay.
  2. Connect a J 39200 DMM between cavity 5 and ground.

Is there battery voltage?

--

Go to Step 3

Go to Step 6

3

Connect a DMM cavity 2 and ground.

Is there continuity?

--

Go to Step 4

Go to Step 7

4
  1. Connect a test lamp between cavity 1 and ground.
  2. Press the rear unlock button on the keyless entry transmitter twice.

Did the test lamp light?

--

Go to Step 5

Go to Step 8

5

Replace the cargo door lock relay.

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

6

Repair open in CKT 540 (ORN) between the cargo door lock relay and the convenience center. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

7

Repair open in CKT 150 (BLK) between the cargo door lock relay and the convenience center. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

8
  1. Check for an open in CKT 253 (BRN) between the cargo door lock relay and the body control module. Repair as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. If no open is found, replace the body control module. Refer to Body Control Module Replacement in Body Control Systems

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--