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  1. Chevy Silverado Forum (GMC Sierra)
    I know this has been on here before but no answers were given. security light is always on and not flashing.Truck runs fine. I changed the pass lock system to include tumbler, housing and wire harness with ignition module. It’s supposed to flash once installed so a re learn can be done. I...
  2. GM Electrical Tech
    Over a year ago, SECURITY (amber light in message center) began randomly & rarely appearing on my 2000 GMC Sierra 1500 5.3 2wd. It has become very frequent. I connected one of the small, mountable, code-readers. It shows almost almost 14 volts. Not sure where the engine's voltage sensor is...
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