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 TESTING
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1
Circuit/System Testing
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1SECTION Circuit/System Testing
- Ignition OFF
- Disconnect the X7 harness connector at the K9 Body Control Module, ignition ON.
- Momentarily connect a 3A fused jumper wire between the control circuit terminal 2 and B+.
- Verify the M13 Door Latch Assembly- Rear Cargo activates.
- If the M13 Door Latch Assembly- Rear Cargo does not activate
- Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the X52A Fuse Block-Passenger Compartment.
- Test for infinite resistance between the K9 Body Control Module control circuit terminal 2 X7 and ground.
- If less than Infinite resistance, repair the short to ground on the circuit.
- Go to next step: If infinite resistance
- Test for less than 2 Ω in the control circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, test or replace the 52A Fuse Block-Passenger Compartment.
- Go to next step: If the M13 Door Latch Assembly- Rear Cargo activates
- Replace the K9 Body Control Module.
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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.