98 GMC sonoma

1998 GMC SONOMA
Avatar
TNOZARTASH
  • MEMBER
  • 1 POST
how do you reset the security code for a 98 GMC Sonoma?

Also, What could cause the security code to go on?
Jan 7, 2011 at 10:14 PM
Advertisement
Avatar
JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Try the relearn procedure. Turn key on, turn key off, then turn key to crank position, no start, leave key on, watch security lite on or flashing. Wait till lite stops flashing, may take ten minutes. Turn key off for 10 seconds, go through procedure twice more for a total of 30 minutes. The relearn should be completed. If that doesn't work, check for applicable trouble codes, see if anything shows up?
Mar 22, 2011 at 12:56 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.