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Lq9 in 04 z71

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Old Mar 3, 2017 | 01:26 PM
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Default Lq9 in 04 z71

Hey guys,
I'm installing a 02 lq9 and 4l65e into a 04 silverado. Will I be able to use the engine harness on lq9 or will I have to use the one that came with the truck?
Also the lq9 came from an 02 Escalade, can I use the rear harness from escalade for fuel pump and rear tail lights? Any info would be appreciated.
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Old Mar 3, 2017 | 05:05 PM
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Your choice,either harness should be very close to being the same.Why would you want to change the rear harness?
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Old Mar 3, 2017 | 08:25 PM
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Originally Posted by tfi racing
Your choice,either harness should be very close to being the same.Why would you want to change the rear harness?
the donor truck (z71) came from Idaho or Iowa some place it snows and salt ate the truck. I'm actually adding the cab and a modified lwb bed ( cut to size and welded in at door opening ) to the escalade frame and powertrain.

So in reality what I have is the complete escalade minus the body then adding unibody a body. I will remove the awd transfer and front end and replace with z autotrac and selectable front end.

I actually have it running now with unrelated cab and wiring harness from escalade. I'm in the process of welding cab/bed together and it's my opinion it will be easier to just use the z71 wiring since its a complete cab, interior......just plug engine harness and rear harness in when I set cab/bed down on it........I know I will have to remove the air ride circuit from rear harness but hope the rest is pretty much straight forward.

The left over harness and 5.3 I plan on dropping in a s-10 with a t56.

On different note I just received ASA cam, trunion upgrade, springs, seals, timing chain and oil pump. Left to round up is long tubes and e fans.......escalade had 34" radiator and I built a harness oh also I'm looking for a 08+ manifold and throttle body and a inline 6 torque converter.
Should be a fun little daily driver. I have a 55 mile one way almost all interstate drive to work. A little bit of light to light drive during the day between projects.
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