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 MANUALSCHEVROLET2009UPLANDER LT, 3.9 MREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSVEHICLE ACCESSDIAGNOSTIC INFORMATION AND PROCEDURESLIFTGATE AJAR INDICATOR MALFUNCTIONCIRCUIT/SYSTEM TESTING
2009 Chevrolet Uplander LT, 3.9 M
Circuit/System Testing
2009 Chevrolet Uplander LT, 3.9 MSECTION Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the liftgate door jamb switch.
- Test for less than 1 ohm between the ground circuit terminal D and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Liftgate Open Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the BCM.
- Install a 3A fused jumper wire between the signal circuit terminal B and ground. Verify the scan tool Liftgate Open Switch parameter is Active.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the BCM.
- If all circuits test normal, test or replace the liftgate door jamb switch.
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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.