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Hey i have a 1992 s10 tahoe model. I want to know if i can use my 4.3 harness for my 5.7. Can any one help me thanks!
 

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It will pretty much be plug and play IF your 5.7 is also a 92 era TBI engine. Will need to get the Prom Chip from a 5.7 TBI to swap in place of the 4.3 one. It contains all the fueling and timing info for the 5.7. It just pops out and into the ECM.
You might have to lengthen a few of the wires for some of the sensors since the 5.7 is 4-1/4" longer.
If you are using a different 5.7 let us know what it is and we can point you towards the necessary wiring.
 
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