How do i reset security system on my 1999 gmc sonoma

SOURCE: 1999 GMC sonoma starte installation

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.

SOURCE: i replaced fuelpump in 2003 gmc sonoma but cant

that's the same problem i have. i have no idea if there's a reset switch or a safety shutoff. help

SOURCE: What does the dashboard "Security"

In your case, im betting that the light comes on while driving and then turns off. This is the pre curser to your vehicle not starting at all. When this happens, you'll be looking for this info here.
This is my generic Vats security answer------


The problem is your Vats security system. This causes the car to either "not start" or "shut down" while running, or start for 5 seconds and then die. (depending on the system) If the security light flashes, i guarantee that this is what the problem is. 1st trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year. If its shuting down while running, im sorry i have no quick fix...

Cheap fix: Bypass the chip in your key. Temporary, but effective. Until the TDM (theft deterrent module) in the dash poops out, then you're kinda screwed. I was told that these types of key security systems have a 7-10 year life span. Sucks for us. This link explains the "Key Issue" pretty well.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. For a list of cars effected by this problem. See the NEWROCKIES link on the right side of their page......... They sell a unit for 200 bucks to totally bypass this system FOREVER. life time-money back and all that. Finally did this in my car. Well worth the 200 if you've looked into getting this replaced... Anywhere from 600-1000 bucks.
----- http://newrockies.ca?ap_id=judd0081
----- With this fix, you can take that whole Vats, passlock, passkey **** system out of your car all together. Good info on both sites

Johnny Brown

• 5763 Answers
• Posted on Oct 06, 2012

SOURCE: My 1999 GMC Sonoma will not start or even crank for that matter.Scan tool has a code 1632 for theft deterant enabled. How do you reset?

This is not a reset problem but rather a bad key or sensor, try a spare key and see if the truck will start, most times it is due to a bad chip in the key or the key reader is bad, so try another key first.

Johnny Brown

• 5763 Answers
• Posted on Oct 06, 2012

SOURCE: Theft Deterant System 1999 GMC Sonoma How to reset?

Try another spare key also make sure battery is good.