Wiring problems on LQ9 swap into '99 Sierra

[tenshikurai]

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?

[RedHeartbeat]

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?

[tenshikurai]

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

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?
[/b]

The &#39;99 harness was for a Vortec 4.3L. I suppose I should&#39;ve mentioned that in the post.

[RedHeartbeat]

Yeah, that helps.

[airdeano]

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

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?
[/b]

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

[Detroitjoe]

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