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 PROCEDURESDTC B1420CIRCUIT/SYSTEM VERIFICATION
2009 Chevrolet Uplander LT, 3.9 M
Circuit/System Verification
2009 Chevrolet Uplander LT, 3.9 MSECTION Circuit/System Verification
Ignition ON, observe the scan tool Battery Voltage Signal parameter while commanding the power sliding door to OPEN and CLOSE by using the power sliding door switch. The parameter should be between 9.6-13.6 volts.
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.