matt iz fly
New member
I HAVE A YUKON XL 2003 AND I PUT A NEW SOUND SYSTEM IN THERE AND EVERY TIME I START THE TRUCK IT TURNS OFF LIKE 2 SECONDS AFTER I PUT THE KEY AND TURN IT.WE HAVE AN ALARM SYSTEM ( VIPER) AND THIS HAPPENED BEFORE BUT WE DONT KNOW WHAT THE SHOP DID TO FIX IT. WE EVEN PUT A BRAND NEW BATTERY IN IT BUT IT STILL DOESNT FIX THE PROBLEM.I THINK THE ALARM IS CAUSING IT AGAIN BECAUSE IT SOUNDS LIKE THE ALARM IS NOT LETING THE GAS IN THE ENGINE. I NEED HELP ON HOW TO RESET THE ALARM OR DEACTIVATE IT. WE LOST THE MANUAL TO THE ALARM. IF U CAN HELP WITH ANY ANSWER I APPRECIATE IT ,,,,,,,,,,,,THANK YOU.............