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

28,095

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

Chevrolet TrailBlazer Experts

  • #1
    bigdogracer
    Reputation
    990
  • #2
    Tom Demyan
    Reputation
    900
  • #3
    tennisshoes
    Reputation
    700
View All

Related Models For Sale

Used Chevrolet Tahoe
792 Great Deals out of 41,765 listings starting at $1,987
Used Jeep Grand Cherokee
1,035 Great Deals out of 72,170 listings starting at $1,195
Used Chevrolet Silverado 1500
2,647 Great Deals out of 173,874 listings starting at $955
Used GMC Envoy
44 Great Deals out of 1,955 listings starting at $2,200
Used Chevrolet Impala
562 Great Deals out of 34,316 listings starting at $1,100
Used Chevrolet Equinox
1,095 Great Deals out of 70,150 listings starting at $1,850
Used Chevrolet TrailBlazer EXT
6 Great Deals out of 1,064 listings starting at $1,995
Used Ford Explorer
1,199 Great Deals out of 69,509 listings starting at $1,000
Used Chevrolet Blazer
8 Great Deals out of 931 listings starting at $950
Used Dodge Durango
364 Great Deals out of 24,188 listings starting at $1,500
Used GMC Yukon
601 Great Deals out of 20,281 listings starting at $2,500
Used GMC Sierra 1500
1,184 Great Deals out of 64,435 listings starting at $999

Used Cars For Sale

2007 Chevrolet TrailBlazer LT 4WD For Sale
10 Great Deals out of 141 listings starting at $2,800
2006 Chevrolet TrailBlazer LT 4WD For Sale
4 Great Deals out of 135 listings starting at $1,999
2005 Chevrolet TrailBlazer LT 4WD For Sale
3 Great Deals out of 113 listings starting at $1,500

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.