i changed altenater n now i need to reset security so it will start ...how do i do that

Asked by Jun 04, 2015 at 07:52 PM about the 2004 Chevrolet TrailBlazer LT 4WD

Question type: Maintenance & Repair

1 Answer

24,075

30 Minute Learn Procedure (requires no tools) 1) Turn ON the ignition, with the engine OFF. 2) Attempt to start the engine, then release the key to ON. (engine will not start) 3) Observe the Security telltale, after approximately 10 minutes the telltale will turn OFF. 4) Turn OFF the ignition, and wait 5 seconds. 5) Repeat steps 1 through 4 two more times for a total of 3 cycles (30 minutes). The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK. IMPORTANT: The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle. In other words, don't forget the final step 4 before you try to start the car. 6) Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.

Your Answer

Add photo

Related Questions

  • Reset security on 2002 Chevy Trailblazer 1 answer

    Security system shut everything down. Won't start, but all gauges light up.

    Chevrolet TrailBlazer

    -

    Maintenance & Repair

  • Reset computer 2 answers

    Do I need to reset my computer after installing throttle body and accelerator pedal?

    2002 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • How do I reset passlock on 2005 chevy Trailblazer? 11 answers

    Battery died Tuesday evening.Put in new battery the next day.Now have power to everything except it will not start. Passlock will flash 3 times then stay on when I turn the switch.Is there any way I c...

    2005 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • Do I need a new battery? 1 answer

    Frequently when I go to start by vehicle, my radio has reset to 1200 am and the brake light comes on.

    2004 Chevrolet TrailBlazer

    -

    Maintenance & Repair

  • 99 suburban security wont reset? 2 answers

    Will start up then shuts off. Security light is on. Tried the 3 10 minute reset and more. Wont reset. Changed a worn ignition cylinder. Security still wont reset, stays on constantly. Still just st...

    1999 Chevrolet Suburban C1500 LT

    -

    Maintenance & Repair

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 800
#2 bigdogracer
bigdogracer
Reputation 770
#3 dandyoun
dandyoun
Reputation 610
View All

Related Models For Sale

Used Chevrolet Tahoe
550 Great Deals out of 29,234 listings starting at $1,699
Used Jeep Grand Cherokee
1,021 Great Deals out of 74,887 listings starting at $750
Used GMC Envoy
68 Great Deals out of 2,125 listings starting at $1,500
Used Chevrolet Silverado 1500
1,717 Great Deals out of 175,749 listings starting at $1,250
Used Chevrolet TrailBlazer EXT
17 Great Deals out of 979 listings starting at $800
Used Ford Explorer
945 Great Deals out of 72,519 listings starting at $1,000
Used Chevrolet Impala
521 Great Deals out of 31,726 listings starting at $1,450
Used Chevrolet Blazer
4 Great Deals out of 1,167 listings starting at $1,255
Used Chevrolet Equinox
1,113 Great Deals out of 71,554 listings starting at $1,500
Used Dodge Durango
274 Great Deals out of 22,704 listings starting at $1,200
Used GMC Yukon
376 Great Deals out of 18,226 listings starting at $2,950
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499

Used Cars For Sale

2007 Chevrolet TrailBlazer LT 4WD For Sale
5 Great Deals out of 151 listings starting at $2,895
2006 Chevrolet TrailBlazer LT 4WD For Sale
5 Great Deals out of 127 listings starting at $1,995
2005 Chevrolet TrailBlazer LT 4WD For Sale
9 Great Deals out of 131 listings starting at $2,450

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.