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 MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 23 (REMOTE KEYLESS ENTRY SYSTEM)COMPONENT TESTSTRANSMITTER TEST
2002 Chevrolet Avalanche 2500, RWD
Transmitter Test
2002 Chevrolet Avalanche 2500, RWDSECTION Transmitter Test
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet Chevy Express, and 2001 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Ensure that transmitter is correct model for Remote Keyless Entry (RKE) system. Wrong transmitter will pass test, but will not work with vehicle.
- Turn on Keyless Entry Tester (J-43241). Place transmitter on keyless entry tester pad and press each button on transmitter. Tone should sound and Green light should light on keyless entry tester when each button is pressed. If keyless entry tester responds as specified, go to step 6 . If keyless entry tester does not respond as specified, go to next step.
- If any buttons cause tone to sound and Green light to light on keyless entry tester, go to step 5 . If no buttons cause tone to sound and Green light to light on keyless entry tester, go to next step.
- Replace transmitter battery, and go to next step.
- Place transmitter on keyless entry tester pad and press each button on transmitter. Tone should sound and Green light should light on keyless entry tester when each button is pressed. If keyless entry tester responds as specified, go to step 6 . If keyless entry tester does not respond as specified, go to next step.
- Replace transmitter. Go to step 7 .
- Synchronize transmitter. See RESYNCHRONIZATION under PROGRAMMING.
- Program transmitters. See TRANSMITTER PROGRAMMING under PROGRAMMING.
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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.