Official NBS 4.3v6 to GEN 3 V8 swap Guide

[carnell]

Out it will go!!!

I'm going to start pulling the engine next thur. Can't wait to get this project finished!!!

[b18c1turboedek]

I got my truck running perfect now. It was low on tranny fluid, that was causing the higher revs.

Just too add a little note in here, i swapped a 2003 4.3 motor too a 2003 5.3 motor, the torque converter worked with no adapters or extensions needed. I used the stock 5.3 flexplate with it as well...

I just tought i would state that for future people looking too do this swap.


Now time too turbo the truck.I want more power already!!!

[zebra]

well... then you'll want a higher stall to build some boost when you launch

[carnell]

Well I'm at a stop for my engine swap. 3 weeks ago, I gave my wiring harness to a local car electrical shop after they told me that the splice and repair would take just over a week. That was 3 weeks ago. When I call I get the owner who says he is going to call me back but he never does. I left him a nasty message last night and he called my wife this morning saying that she can pick up the harness after 2pm. He calls her and asks for a delay. My wife, digs her teeth in and he now says that he's going to drop it off at our house tonight, again after a few hours past, my wife calls and he says he just around the corner. That was 3 hours ago. My guess is the for what ever reason he doesn't have the harness. I'm not sure what my legal options are but I now have to find a full working engine wiring harness. WTF......

****Update****

The shop owner just left my house (10pm). The harness he had wasn't mine. I had every connection taped with blue & white tape stating location and purpose of plug. Not one piece of tape was on there. The 2 big connections for the PCM where wrong. I have a blue and red and his harness was blue and green. It also had a DBW connector and I have a 02 5.3 that has a cable throttle. I'm beside myself...... Needless to say he took the harness back with him to make the changes.

[gottaswapup]

File a complaint with the Better Business Bureau, for starters.

[RedHeartbeat]

not if it has the long crankshaft on the rear of the engine. If the same amount of crank extends from the 6L as the 5.3L then it will swap straight out.

[mattyboy80]

i have an 04 with a 4.3l 5 speed

[Frenchy]

99-00 6.0's have the longer crank, and iron heads.

[BleuII]

Can anyone verify that these are the part numbers for the frame brackets for the V8 motor mounts?
15871387 and 15113851