Re: engine swap
I think TPS and IAC plugs are different, but since you have donor you have parts you need. Computers are same, but chip or pill as some call it are different, but again have donor vehicle to get right one.
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2000 GMC CCSB 454/4L80 6” lift SAS
1999 Chevy CCSB 454/NV4500 6” lift
1999 GMC Yukon 350/4L60 4" SAS
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