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Discussion Starter · #1 ·
Hey guys can anyone please help me? I'm almost done with my LS swap but am stuck atm trying to figure out how to wire the alternator. The 5.3 alt that I have has 3 wires in the plug. One is pink w/ blk tracer, the next is a light brown or tan, and the third is black w/ white tracer. The pink/blk wire is in the P spot. The brown wire is in the L spot and the blk/white wire is in the S spot. The old engine was a 4.3 and only had 2 wires. Do I even need all 3 now? Any help is greatly appreciated.
 

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Discussion Starter · #3 ·
at the top is the search bar. Alt questions get asked every couple of weeks, i know it has been answered here. Also, search the LS section.
I have been searching but nothing I've came across has been the same as what I'm looking for. Not saying it isn't there I just may not understand the way they are explaining it. Electrical stuff is like Chinese to me lol. Everyone else is saying they only have 2 wires and there not the same color as mine. I freaking suck at wiring but I'm almost done.
 

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The 3 wire alternator is probably PCM controlled if it's the one that came on the 5.3. That brown wire goes to the computer. Put a 99 4.3 alternator on it. It mounts the same but is the earlier design w/o computer control.
Might be a different shaped plug than your 92, but those can be swapped easily.
 

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Discussion Starter · #5 ·
The 3 wire alternator is probably PCM controlled if it's the one that came on the 5.3. That brown wire goes to the computer. Put a 99 4.3 alternator on it. It mounts the same but is the earlier design w/o computer control.
Might be a different shaped plug than your 92, but those can be swapped easily.
Ok. I didn't know the 4.3 alt would fit in the 5.3 bracket. Thanks for the info man ill look into this.
 
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