Your security light came on and when you stopped the car and restarted it the light was off now 2days later your car will not start?

well this would indicate a problem with the passlock system. My girlfriends car does the same light thing but always starts. you may want to have the passlock system checked out.

AnswerQuickest,cheapest way to fix it is replace the instrument panel. look for one on car-part.com

The security feature inside the panel has gone bad. My buddy sent his off to get it rebuilt ($700) & 2 months later is happened again. Spend $50, & invest an hour to do it.

This is a common problem. There is one way to bypass it , but this will only work 2-3 times.

Turn ignition to the "on" position but do not start it. Leave on for 10 minutes. Crank it up, it will start. The computer is re-learning itself during this time.

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.

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

2007-2008 I290/I370

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Cars/Vans

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Isuzu

2003-2007 Ascender

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Pontiac

1994-2003 Grand Prix

1998-1999 Montana

2006 Torrent

1996-2005 Grand AM

1994-1998 Trans Sports

1988-1999 Bonneville

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

1994-2004 Aurora

1998-2004 Bravada

1991-1993 Delta 88

1994-1999 Eighty-Eight

1991-1996 Nighty-Eight

1998-2002 Intrigue

1990-1992 Toronado

1994-1997 Cutlass Supreme

1997-1999 Cutlass

1997-1999 LSS/Regency

1997-1999 Silhouette

1991-1996 Custom Cruiser

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Chevrolet/GMC

1998-2005 Astro/Safari

1998-2008 Envoy

2005-2006 Equinox

1998-2007 Savana/Express

1995-2005 Monte Carlo

1997-1999 Venture

1995-2001 Lumina

1988-2002 Camaro

1995-2005 Cavalier

1982-2004 Corvette

1994-1996 Caprice/Caprice Wagon

1995-1996 Impala SS

2000-2005 Impala

1997-2005 Malibu Classic

1997-2003 Malibu

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Cadillac

1986-1993 Allante

1982-1996 Fleetwood

1985-1996 Fleetwood Brougham

1992-2004 Seville

1992-2004 SLS/STS

1985-1999 Deville

1994-1999 Deville Concours

1997-1999 Deville D'Elegance

1988-2002 ElDorado

1994-2002 ElDorado Touring

1999-2007 Escalade

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Saturn

2000 LS/LS1/LS2/LW1/LW2

2001-2002 L100/LW100

2001-2003 L200/LW200

2001-2005 L300/LW300

2004-2005 L-Series

2002-2008 VUE

1996-2002 SL/SL1/SL2

1996-2002 SC1/SC2

1996-2002 SW1/SW2