WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The diagnostic assumes the transmitter worked with the vehicle at one time.

Place the transmitter on the J 43241 test pad and press each transmitter button one at a time. See Special Tools . The tester should sound a tone and illuminate a green light with each button press.
- If one or more buttons do not function, 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 function while observing the vehicle. The vehicle should perform each of the corresponding functions selected on the transmitter.
- If any function does not work, program the keyless entry transmitter, refer to Remote Control Door Lock Transmitter Programming . If any function still does not work after reprogramming, replace the transmitter. If any function still does not work after replacing the transmitter, replace the RCDLR.

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.

Safety Warning

Circuit/System Verification

Use the Manual With the Right Hardware

When to See a Mechanic