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I'm about to pull my stock engine and drop a Built replacement in.
2000 L, original engine vented and was replaced with an '04 complete. I pulled the engine apart in situ and left the wiring under the hood.Put the new engine in and reconnected all. I lengthened the AI 2 wire on the '00s original harness to reach the sensor and it's been fine. I want to put the Built engine in and use the '04 harness, mainly so the takeout is complete.

Are there any differences in between the two harnesses or connector plugs? I'm asking 'cos I see where folks are using PCMs off different years and have to change a wire to keep things kosher.

'00 truck,'04 harness, plug it all into '00 loom and PCM....will it work?
 

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I think there's a pinout difference with the ICP's in the PCM but not 100% sure
 
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