psycoticss Posted July 25, 2016 Report Share Posted July 25, 2016 Hi members need of help, I have a 03 sierra v6 which I did a v8 swap then I swap the interior harness to get power door locks and windows, got it working except the security like came on I ran the truck fine one day I started the truck and it shut off I taught it was the pump changed it out. It still won't start tried to the relearn key got light off but it still won't start, bought a alarm remote it locks and unlocks the truck but it won't start, any help please thanks. Quote Link to comment Share on other sites More sharing options...
chevybowtie72 Posted July 26, 2016 Report Share Posted July 26, 2016 Good job getting that all in one sentence. Quote Link to comment Share on other sites More sharing options...
psycoticss Posted July 26, 2016 Author Report Share Posted July 26, 2016 Any help. Quote Link to comment Share on other sites More sharing options...
1981evildisco Posted January 24, 2017 Report Share Posted January 24, 2017 Take it to a GM dealer and have them unlock the ECM. That's the only thing I can think of. There's an emergency procedure to limp a vehicle that has a locked ECM involving a fuse but I can't remember what it is. Also, this forum is for owners of Silverado SS trucks (2003-2006) So honestly I'm not surprised no one answered. Quote Link to comment Share on other sites More sharing options...
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