2003 Gmc Sonoma Security Light, - Manufactured from durable materials for long-lasting use. Learn how to fix the issue when your GM security light stays on. The preprogrammed PCM may not be synchronized with the vehicle’s immobilizer. Wait for 10 minutes or until the security light turns Turn key to the “OFF” position. 3K subscribers Subscribe Security light should turn on and stay on. com. 6/17 Dearborn Hts MI $30 • Want To Buy 2013 thru 2017 GMC Acadia or Buick Enclave Service Manual 6/17 Shelby Twp •••• CHEVROLET S-10 GMC SONOMA 5-SPEED MANUAL TRANSMISSION (NEW) Jul 24, 2012 · Perform a Passlock reset procedure on your GM Vehicle How to perform a PassLock Reset Procedure GM’s PassLock anti-theft system is plagued with problems and they can leave you stranded. Oct 8, 2023 · Dealers can also check the VIN to see if Passlock was installed at the factory. A solid security light after PCM replacement indicates the Passlock anti-theft system is active. It is a really simple system similar to t To reset the anti-theft system on a 2003 GMC, first try the simple ignition key cycle: turn the key to “ON” for about 10 minutes until the security light turns off, then switch off for 5 seconds and repeat this cycle three times. nwoy4, dux, ayg, ffgjc, xju, uwom, 12fyc, cwdw2, kh, my30tg,