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 PROCEDURESACCESS PANEL RELEASE MALFUNCTIONCOMPONENT TESTING
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1
Component Testing
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1SECTION Component Testing
Relay Test
- Ignition OFF, disconnect the appropriate access panel relay.
- Test 60 - 200 Ξ© between terminals 85 and 86.
- If the resistance is not within the specified range, replace the relay.
- Test for infinite resistance between the following terminals:
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
- If not the specified value, replace the relay.
- Install a 15 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 Ξ© between terminals 30 and 87.
- If greater than the specified range, replace the relay.
Access Panel Actuator Test
- Ignition OFF, disconnect the harness connector at the appropriate access panel actuator.
- Ignition ON, install a 15 A fused jumper wire between the control terminal 3 and 12 V. Momentarily install a jumper wire between the ground terminal 4 and ground. The access panel actuator should perform the RELEASE function.
- If the function does not perform as specified, replace the access panel actuator.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.