Question about 2000 Chevrolet Blazer

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Someone tried to steeal blazer. broke out the ignition tumbler. I replaced it with one from a junk yard, now wont run. does it have to do with the security system?

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  • 293 Answers

Check the contacts of the replacement ignition switch.

Posted on Nov 09, 2012


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Posted on Jan 02, 2017

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SOURCE: ignition key won't turn

Sometimes it is the key. On certain vehicles the key has a small chip in it and over time these do get worn out. I would have a locksmith or the dealer cut you another key but please go to a reputable locksmith or dealer. I hope this works for you (it should). If not put another post and I can probably walk you through replacing the cylinder unless you feel more comfortable having a mechanic do it and paying him/her lots of money. Good luck

Posted on Feb 12, 2009

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SOURCE: anti theft system needs reset/relearn procedure

Have the computer re-flashed

Posted on May 29, 2009

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SOURCE: 2003 s10 I had to change the ignition tumbler/key

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON, vehicle 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.
  6. Turn off the ignition and then attempt to start the engine.
  7. Clear any codes.
  8. If this don't work you will have to take it to a dealer and program it through there computer system.

Posted on Aug 11, 2009

  • 36 Answers

SOURCE: wont start security light stays on

Body Control Module (BCM) on both counts. Find a shop in your town that specializes in electrical systems to test it. Beware, these can be intermittent problems, so make sure they keep it until the car does what you have observed. Expect to spend about $450 for the replacment. Dealers quoted me between $700 and $1,100 for the same repair. By the way, a new BCM will probably only last you about 12 months.

Posted on Aug 14, 2009

  • 546 Answers

SOURCE: ignition tumbler locked up

try a spare key, or push key into lock while turning
it is the tip [pointy end] of the key that releases the switch tumbler lock allowing it to turn. keys & switches wear out, a 'heavy' key ring especially wears the switch.

Posted on Oct 17, 2009

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2004 buick century,security light stays on, no problems with starting/driving, how can I reset turn off? tried the 10 min/turn key to on poss,didnt work

The security light is probably on because of the key tumbler sensor where the ignition switch is at is bad or corroded. The security light on while your able to start it means the anti theft system is disabled and it will start every time. If you want you can replace the sensor on the tumbler for under $100 on your own or run to a junk yard to grab a replacement sensor.

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However it also depends on how bad was it broken.

Please let us know for future assistance.
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Looking for keys and locks

Door lock barrels are available keyed as a set of 3 from Paddock Spares -

Ignition Barrels are also available from them complete with new keys.

Thank you for using Fixya.

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1986 Thunderbird Starting problem, Turn key starts, let go of key stops

Replace the ignition tumbler--i.e. get a new ignition set with new key. This will require removing the plastic trim around the steering column and removing the old ignition set. It's a good DIY project, but you should get a Haynes manual for 83-88 T-Bird/Cougar. Try going to a junk yard for the replacement part. Crown Vics, Cougars, Grand Marquis', Lincolns all have the same type of set for those years.

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