Question about 1999 GMC Sonoma
I need to bypass the security system so i can drive the truck dealership wants 1000 to replace bcm and flash, please help thanks robert
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Posted on Jan 02, 2017
I experienced this problem, intermittant failure to start. This procedure must be done with the truck RUNNING.
Remove the cover off of your ignition switch. On the top there is a small wire connector that, once the truck is running, should be disconnected. This will turn on the 'SECURITY' light. All will be better, except the security light will be on at all times, much cheaper than replacing the ignition switch, however.
Posted on May 10, 2009
2.2L Engine remove protective shields as needed then remove front exhaust pipe. Remove the brace from the engine to the clutch housing, then disconnect starter wiring. 4.3L Engine 2 wheel drive just remove the right front tire and you will have access to the wiring. 4.3L Engine 4 wheel drive you must remove the differential carrier shield if equipped then remove the starter bolts and rotate the starter to get access to the wiring. Good Luck.
Posted on Jun 15, 2009
I think you could but it would be extremely hard and time consuming.All you need to do is take to your local GM dealer for them to use there Tech2 to learn the new key code into the body control module.
Posted on Aug 22, 2009
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