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2003 Sierra No Start


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Sup fellas, I'm new to the board.

 

Anyway I'm in a tough spot here. I have an '03 Sierra 1500 regular duty, 4.3 V6 4x4 that won't start. Checked fuel pressure, it's fine, it's getting spark, the secondary ignition system is only about 6 months old. The only real lead I have is when I turn the engine over and let go of the key the Passlock light stays on.

 

Any ideas? I'm stumped...

 

By the way I did search the baords and didn't come up with anything before I posted...

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