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 MANUALSCHEVROLET2008IMPALA LT, 3.9 3REPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESTIRE PRESSURE MONITOR SYSTEMSTPMS RESET PROCEDURESTIRE PRESSURE SENSOR RELEARNUSING KEYLESS ENTRY SYSTEM
2008 Chevrolet Impala LT, 3.9 3
Using Keyless Entry System
2008 Chevrolet Impala LT, 3.9 3SECTION Using Keyless Entry System
- Turn ignition switch to ACCY position. Apply parking brake.
- Simultaneously press the keyless entry transmitter's lock and unlock buttons until a double horn chirp sounds, indicating the learn mode has been enabled.NOTE: The left front turn signal will also illuminate to indicate the learn mode has been enabled.
- Starting with left front tire, follow either of these 2 procedures:
- Increase/Decrease Method: Increase or decrease tire pressure for 8-10 seconds, then wait for the horn to make a chirp sound. The horn chirp may occur before the 8-10 second pressure increase/decrease time period has been reached, or up to 30 seconds after the 8-10 second pressure increase/decrease time period has been reached
- Sensor Activation Tool Method: Starting with the left front tire, hold the activation tool against the tire wall aiming upward with the antenna. Press the activate button and wait for a horn chirp.
- After horn chirp has sounded and the right turn signal has illuminated, repeat procedure for the next 3 sensors in the following order: right front, right rear and left rear.
- After left rear sensor has been learned, a double horn chirp will sound, indicating all 4 sensor IDs have been learned. Turn ignition switch to OFF position. Adjust all tire pressures to specification.
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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.