Question about 1999 Chevrolet Blazer

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I have a 99 blazer 4.3 vortec spider injection truck starts right up and dies immediatly and security light is on nonstop will run my battery down if I don't unhook it? Please help

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Check the yellow fuse labelled TBC first, this is in the engine compartmentI have a 99 blazer 4.3 vortec spider injection - macvernal_3.jpg

Posted on Apr 10, 2011

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Its the ignition key switch and housing that needsto be replaced.GM PASSLOCK SECURITY System is shutting down your injectors.It disables the injectors so that a would be thief can't steal it,like if he busted the key switch out and trys to start it.It does'nt reconize your key code.

Posted on Apr 10, 2011

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Have a GMC 99 Sonoma p/2Wheel Dr have gas supply issue has gas to motor pressure looks good but won t start,will run if spray starter fl in carb then dies ???


Just for the record, thats the throttle body.
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1 Answer

99 blazer starts then immediatly dies has good fuel pressure security light is on constantly and will run the battery dead? Any help


Its the PASSLOCK Security system that is the problem,its shutting down the fuel injectors so a would be burglar can't steal it.You can either replace the ignition key switch or get to the wires coming from the switch in steering column and cut the yellow wire and tape ends.This way the injectors can't be disabled.

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