2001 Chevrolet Blazer Logo
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dudley brearley Posted on Jan 06, 2015
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How to reset security code in 2001 chevy blazer

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Joe Taylor

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  • Chevrolet Master 2,229 Answers
  • Posted on Jan 19, 2015
Joe Taylor
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Joined: Apr 08, 2011
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The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://www.diy-gm-security.com/
http://newrockies.com/

  • Mike Reifel
    Mike Reifel Sep 17, 2018

    Hi, I love the idea but, you are going to have to show me the entire installation procedure with pictures and degree of difficulty. I have a 2004 ZR2 chevy blazer. I know for a fact that dealing with the wires going through he firewall is ridiculously hard. My blazer shut down on me last night, no fuel to the engine, I'm in it right now.

  • King lokocena Oct 16, 2019

    I removed my car battery and it lost it sense how can I reprogram it

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5 Related Answers

Anonymous

  • 31 Answers
  • Posted on Jun 06, 2009

SOURCE: WHERE IS THE SPARE TIRE LOCATED ON MY 2001 CHEVY BLAZER.

check in trunk if its not ther its mostly where most suvs have it under the trunk but i mena by the outside where the exhaust is if not there ur missing it

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Anonymous

  • 11 Answers
  • Posted on Apr 26, 2009

SOURCE: 2001 chevy blazer replaced fuel pump, wants to

hi its rob was it running befor u replaced the pump if its petrol take out the spark plugs maken sure not to mess up the timeing give them a clean .if its deizil prime the system o open the injectors

Anonymous

  • 1 Answer
  • Posted on May 02, 2009

SOURCE: need help with reoccuring p410 on 2001 blazer w/4.3

http://www.gm-trucks.com/forums/index.php?showtopic=38241

Anonymous

  • 334 Answers
  • Posted on Feb 20, 2011

SOURCE: 2001 chevy blazer has power,

It's when the security light starts flashing that the infamous "chip" in the key becomes a nightmare to many. Gradually the car begins not cranking anymore or if it cranks it would start and die in a second. Randomly it will do this more and more often until it won't start anymore. VATS, PASSkey and Passlock immobilizer systems are killing cars all over North America, they have a short lifespan and are certainly more effective against owners than thieves. Here is how you save your car
1st trick, Try a spare key that is newer or used less. The pins wear down and so do the keys causing security fail. 2nd trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year. If its shutting down while running, im sorry i have no quick fix... If anything on this page helps you, please remember to comment or give me a thumbs up on the myfixya sight so i can have a better rating to help more people on this. Thanks

Cheap fix: Bypass the chip in your key. Temporary, but effective. Until the TDM (theft deterrent module) in the dash poops out, then you're kinda screwed. I was told that these types of key security systems have a 7-10 year life span. Sucks for us. This link explains the "Key Issue" pretty well.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. They sell a unit for 200 bucks to totally bypass this system FOREVER. life time-money back and all that. Finally did this in my car. Well worth the 200 if you've looked into getting this replaced... Anywhere from 600-1000 bucks. If you do buy this, please purchase it thru this link. The cost is the same, but i get credit for the sale and im trying to earn my money back, as you will be able to do if you buy fron NewRockies and join the free affiliate program. Thanks
----- http://newrockies.ca?ap_id=judd0081 ----- With this fix, you can take that whole Vats, passlock, passkey system out of your car all together. Good info on both sites.

It works for:
Any GM or Isuzu Vehicle with VATS or PASSKey or PASSLock security systems.
If your car has the chip in the key or in the lock cylinder, then you can save it with this Full Bypass.
Trucks
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GMC/Chevy
1998-2006 S10/T10/Sonoma
/Blazer/Jimmy
1998-2007 Suburban/Avalanche
/Tahoe/Yukon
1998-2006 Sierra/Silverado
2002-2008 Trailblazer
2003-2006 SSR
1998-2006 C1500/C2500/C3500
1998-2006 K1500/K2500/K3500
2003-2007 Hummer H2
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Isuzu
1998-2000 Hombre
2005-2006 I280/I350
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Isuzu
2003-2007 Ascender
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1998-1999 Montana
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1996-2005 Grand AM
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1988-2002 Firebird
1995-2005 Sunfire
1996-2002 Trans Am
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Buick
2004-2007 Rainier
1994-2005 Century
1993-2004 Regal
1982-1999 LeSabre
1991-1996 Park Avenue / Ultra
1994-1996 Roadmaster
1991-1996 Roadmaster Estate Wagon
1982-1999 Riviera
1988-1991 Reatta
1996-1998 Skylark
1982-1990 Electra (all models)
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Oldsmobile
1996-1998 Achieva
1999-2004 Alero
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1994-1999 Eighty-Eight
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1998-2002 Intrigue
1990-1992 Toronado
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Chevrolet/GMC
1998-2005 Astro/Safari
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1995-2001 Lumina
1988-2002 Camaro
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2000-2005 Impala
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1986-1993 Allante
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Saturn
2000 LS/LS1/LS2/LW1/LW2
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2001-2005 L300/LW300
2004-2005 L-Series
2002-2008 VUE
1996-2002 SL/SL1/SL2
1996-2002 SC1/SC2
1996-2002 SW1/SW2

Anonymous

  • 1165 Answers
  • Posted on Feb 23, 2011

SOURCE: How long does it take for the codes to clear after

On the OBDII system, the codes have to be cleared with a scanner. They will not clear themselves, and disconnecting the battery or pulling the fuse to the ECM will not clear the codes. You may be able to get the check engine light to go off, but the codes will remain until the scan tool clears them.

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