GM TPMS Relearn
- Turn the ignition on
- Put vehicle into learn mode
- Most models: Hold the keyfob’s lock & unlock buttons until the horn beeps
- Older vehicles: turn the park lamps off then on four times
- Newer cars & trucks: switch to tire display in the driver information center and hold the okay button until the horn beeps
- Using a TPMS tool, test the front-left sensor – the horn should beep
- Test the front-right, rear-right, then rear-left sensors; the horn should beep when testing each sensor
- The horn should beep two more times and the warning light will turn off
- If the tire display doesn’t show pressures, test the sensors again or drive the vehicle for a couple minutes
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