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 LOCKSREMOTE FUNCTIONSDIAGNOSTIC INFORMATION AND PROCEDURESKEYLESS ENTRY SYSTEM INOPERATIVECIRCUIT/SYSTEM VERIFICATION
2009 Chevrolet Uplander LT, 3.9 M
Circuit/System Verification
2009 Chevrolet Uplander LT, 3.9 MSECTION Circuit/System Verification
- Verify that the transmitter is the correct transmitter for the vehicle.
- If not the correct transmitter, replace the transmitter.
- Place the transmitter on the test pad of the J 43241
and press each button of the transmitter one at a time. See Special Tools . The tester should sound a tone and illuminate a green light when each button is pressed.
- If one or more buttons does not sound the tone and illuminate the green light, replace the transmitter battery and retest with the J 43241 . See Special Tools . If the condition continues after battery replacement, replace the transmitter.
- Operate the transmitter while observing the scan tool Fob Function parameter for the appropriate transmitter. The parameter should correspond with the function selected on the transmitter.
- If the parameter does not match the function selected on the transmitter, program the transmitter and retest. Refer to Transmitter Programming . If the condition continues after transmitter programming, replace the transmitter.
- If all circuits test normal, replace the RCDLR.
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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.