4.3 to 5.3

[Botlfed]

not 100% sure, but i dont think it will.

[Trevor]

no you need a 03+ harness.

[banker099]

so what year harness do i need i have an 04 v6 that has an 04 motor going in im keeping it cable driven, will an 02 harness work??

what color are your factory pcm plugs?

red/blue or red/green?

red/blue= 99-02 harness

green/blue= 03-06 harness

[DennisG_02Silverado]

ok so all i wouldr really need is new throttle and cruise control cable, harness, pcm, accessories, compressor, frame n motor mounts, ac hoses. correct?

the ps pump and alternator are the same. i work at oreillys so i looked part #'s on both v6 and v8