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 MANUALSCHEVROLET2020EXPRESS 2500 LS, 2.8L ENG VIN 1REPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSVEHICLE ACCESS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B3265CIRCUIT/SYSTEM VERIFICATION
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1
Circuit/System Verification
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1SECTION Circuit/System Verification
- Ignition ON.
- Verify the M13 Door Latch Assembly-Rear Cargo performs the LOCK and UNLOCK functions when using the S13A Door Lock Switch-Rear Cargo
- If the M13 Door Latch Assembly-Rear Cargo LOCK or UNLOCK functions do not work
Refer to: Power Door Locks Malfunction
- Go to next step: If the LOCK and UNLOCK function works
- If the M13 Door Latch Assembly-Rear Cargo LOCK or UNLOCK functions do not work
- Ignition OFF
- Verify the M13 Door Latch Assembly-Rear Cargo performs the UNLOCK function when pressing the appropriate switch on the keyless entry transmitter.
- If the M13 Door Latch Assembly-Rear Cargo UNLOCK function does not work
Refer to Circuit/System Testing
- Go to next step: If the UNLOCK function works
- If the M13 Door Latch Assembly-Rear Cargo UNLOCK function does not work
- All OK.
RENDER: 1.0x
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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.