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LS Swap into 90'GMC 1500 Wiring Help!

This is a discussion on LS Swap into 90'GMC 1500 Wiring Help! within the Stereo and Electronics forums, part of the General Help category; I put a 5.3l into my gmc short box. Bought a wiring harness from painless preformance and that went well, ...

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    1990 GMC 1500

    LS Swap into 90'GMC 1500 Wiring Help!

    I put a 5.3l into my gmc short box. Bought a wiring harness from painless preformance and that went well, but the original wiring is holding me back. I dont know which wires provide the fuse blocks in the truck with power, and how to tie into the ignition. Ive tried finding a wiring diagram but they dont specify how the blocks are powered. My understnding is they get power from the ignition switch... and then everything should work as before. Any help would be appreciated!!! Thanks

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    Senior Member bigrondownhiller's Avatar
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    1996 Camaro Z28 vert

    Which fuse block? Under hood or in the cab?

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