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 MANUALSCHEVROLET2019EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN GREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 41 (POWER DOOR LOCK SYSTEM AND RELEASE SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3265CIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G
Circuit/System Verification
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 GMC Savana 3500, 2018 GMC Savana 2500, 2018 Chevrolet Express 3500, and 2018 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
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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.