Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 984 (REMOTE KEYLESS ENTRY SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDOOR UNLOCK FUNCTION INOPERATIVE WITH TRANSMITTER
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Door Unlock Function Inoperative with Transmitter
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Door Unlock Function Inoperative with Transmitter
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Yukon, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, and 2001 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Door Unlock Function Inoperative with Transmitter
| Step | Action | Yes | No |
|---|---|---|---|
| DEFINITION: Use this diagnostic chart when the door unlock function is inoperative when using the keyless entry transmitter. All other keyless entry functions operate normally. | |||
| 1 | Did you perform the Remote Keyless Entry System Check? | Go to Step 2 | Go to Diagnostic System Check - Remote Keyless Entry |
| 2 | Press the door unlock button on the transmitter. Do the door locks operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Operate the door locks from the controls inside the vehicle. Do the door locks operate normally? |
Go to Step 4 | Go to Diagnostic System Check - Door Systems in Doors |
| 4 |
IMPORTANT:
Inspect that the keyless entry transmitter is the correct model for the vehicle remote system. A wrong model transmitter may pass this test, but will not activate the vehicle remote system.
|
Go to Step 5 | Go to Step 7 |
| 5 | Test the body control module (BCM) portion of the lock relay control circuit for an open or high resistance. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections
, and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 8 |
| 7 | Replace the transmitter. Refer to Remote Control Door Lock Transmitter Programming . Did you complete the replacement? |
Go to Step 9 | - |
| 8 |
IMPORTANT:
Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the replacement?Perform the BCM programming procedure when replacing the BCM. |
Go to Step 9 | - |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.