Wiring problems on LQ9 swap into '99 Sierra

Ok, so I've finally got the motor in, and I'm working on getting everything hooked up, but I've hit a few snags. The motor is out of an '04 Siverado SS, and it's going into my '99 Sierra. I'm having problems with the connections under the fuse block. There are 3 connections on the old harness, one wrapped with purple tape, one with green tape, and one unwrapped 3 pin connector. The new harness only has the purple and green connectors, and the purple one has a different connector, and more wires. Any ideas? I'm assuming I'm just going to have to get pin-outs for both motors, and swap connectors and pins around until they match. Anybody had to do this before?

I've never done the swap but wonder why you didn't use the stock 99 harness on the LQ swap. Was something different? What engine was in it before?

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Dec 17 2006, 05&#58;27 PM) [snapback]76583[/snapback]</div>

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I&#39;ve never done the swap but wonder why you didn&#39;t use the stock 99 harness on the LQ swap. Was something different? What engine was in it before?
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The &#39;99 harness was for a Vortec 4.3L. I suppose I should&#39;ve mentioned that in the post.

:whack: Yeah, that helps. :laugh:

<div class='quotetop'>QUOTE(tenshikurai &#064; Dec 17 2006, 08&#58;11 PM) [snapback]76579[/snapback]</div>

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Ok, so I&#39;ve finally got the motor in, and I&#39;m working on getting everything hooked up, but I&#39;ve hit a few snags. The motor is out of an &#39;04 Siverado SS, and it&#39;s going into my &#39;99 Sierra. I&#39;m having problems with the connections under the fuse block. There are 3 connections on the old harness, one wrapped with purple tape, one with green tape, and one unwrapped 3 pin connector. The new harness only has the purple and green connectors, and the purple one has a different connector, and more wires. Any ideas? I&#39;m assuming I&#39;m just going to have to get pin-outs for both motors, and swap connectors and pins around until they match. Anybody had to do this before?
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the fuse block for 99-02 trucks is different than the 03-06 models.
schematically different pinouts and physically different.
youll have to repin your fuse block connector with the new wiring.
upgrading to the 03-06 fuse block will complicate your mission, as
the interior pinout for the 99-02 isnt as complete as the 03-06.
especially the v6 version as it uses the older black vortec computer.

airdeano

could somebody explain each connector and what they connect to
2-PCM
what are the color ones that connect near the PCM???