2003 chevy blazer security light on and won't start

Asked by Guru9Q5YV Jul 08, 2017 at 08:22 AM about the 2003 Chevrolet Blazer LS 4-Door 4WD

Question type: Maintenance & Repair

Car tries to start, but the security light comes on and it won't start.  Can I
disconnect the passcode somehow?  

2 Answers
510

lord00 answered 6 years ago

the security light indicate an error with the NATS communication line and you will need to diagonise it to.know what.exactly is wrong.with.the car.

1 people found this helpful.
Mark helpful
120

Jim answered 5 years ago

I had this problem. After trying every trick in the book. The Chevy dealer said I needed a new Body Control Module. In the 2500 Silverado there is a fusebox under the hood on top of the left front fender. The fuse was marked TBC and was the closest to the fender in the back corner toward the firewall. Mine is a little 10 amp fuse. Hope it helps.

Mark helpful

Your Answer:

Related Questions

  • 2003 chevy blazer security light on and won't start 2 Answers

    Car tries to start, but the security light comes on and it won't start. Can I disconnect the passcode somehow?

    2003 Chevrolet Blazer LS 4-Door 4WD

    -

    Maintenance & Repair

  • 2003 Chevy Blazer won't start 2 Answers

    Usually when I start my truck it turns over as soon as you turn the key. This morning I went to turn it over and it wouldn't act like it wanted to start until I turn the key off now my security lig...

    2003 Chevrolet Blazer LS 2-Door RWD

    -

    Maintenance & Repair

  • Chevy blazer won't start? 1 Answer

    95 chevy blazer, v6 vortec 4.3 4door 4Wd Alright so we are at a loss here and we have had all our friends who re mechanics come out and try to fix it and no dice. It started day 1 with a rough i...

    1995 Chevrolet Blazer LS 4-Door 4WD

    -

    Maintenance & Repair

  • 2003 Chevy Blazer won't stay 7 Answers

    Few days ago went to Sam's Club when I came out to leave my car wouldn't start. Got brand new battery 2 weeks ago. When it first happened didn't think it was starter so checked distributor car r...

    2003 Chevrolet Blazer LS 2-Door RWD

    -

    Maintenance & Repair

  • Chevy blazer won't start 3 Answers

    My blazer won't start use to I park it for about 3 years now won't start spits and sputters like it want to start but will not put new cap and rotor still won't start plugs firing what is wrng

    2000 Chevrolet Blazer LS 4-Door RWD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Blazer Questions

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    4,240
  • #2
    Rowefast
    Reputation
    3,540
  • #3
    yetilikesbeer
    Reputation
    2,410
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Trailblazer
14 Great Deals out of 1,365 listings starting at $18,995
Used Chevrolet Tahoe
12 Great Deals out of 806 listings starting at $9,980
Used Jeep Grand Cherokee
140 Great Deals out of 3,673 listings starting at $5,555
Used Chevrolet Silverado 1500
195 Great Deals out of 7,896 listings starting at $3,000
Used Ford Explorer
51 Great Deals out of 2,017 listings starting at $6,990
Used Toyota RAV4
140 Great Deals out of 3,035 listings starting at $3,900
Used Chevrolet Camaro
15 Great Deals out of 467 listings starting at $10,995
Used Chevrolet Colorado
40 Great Deals out of 1,203 listings starting at $2,499
Used Toyota 4Runner
27 Great Deals out of 553 listings starting at $7,700
Used Honda CR-V
192 Great Deals out of 4,984 listings starting at $440

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. Content will be removed if CarGurus becomes aware that it violates our policies.