Official NBS 4.3v6 to GEN 3 V8 swap Guide

[zebra]

^^ this. sorry it takes me a while to reply. work's been pretty busy lately

[obukev]

Hi everyone,

I have read everything I can and haven't found a clear answer so at risk of being scolded for not searching I will ask you guys. I have a 2003 Silverado 1500 RCSB with a 4.3L V6. I will be swapping for a 6.0L and found a 08 6.0/4L70E combo with all the trimmings. Am I looking at the same swap mentioned here? Does the 08 engine require anything beyond the scope of this guide? Should I start a new thread?

[Frenchy]

Nothing overly extravagent. A box from Lingenfelter to covert the 58x crank signal to 24x, tapping the side of the block for the Gen3 knock sensors and extending the cam sensor harness. Oh and the Torquerush X-link to run the larger throttle body.

[obukev]

Thank you, Frenchy. I will post pictures and my experience when the time comes. Hurry tax season.... I am ready to pass somebody on the highway without concern that my gutless v6 will be able to accelerate up a hill.

[Daniel23]

Where did you get the engine frame mounts for the driver side or do you have the part n#? I have a 2wd silverado i have the passenger side working i just need the frame mount for the driver side my donor truck is 4wd so i can't use it.

[Frenchy]

Dealership or junkyard

[ducky]

Where did you get the engine frame mounts for the driver side or do you have the part n#? I have a 2wd silverado i have the passenger side working i just need the frame mount for the driver side my donor truck is 4wd so i can't use it.

What Frenchy said. Make sure you get the 2WD ones and not 4wd.

[zebra]

most of the yards i called had stacks of 2wd ones

[CHEVROLADE]

Looks like ill be doing this swap soon

One thing can I use a 03' harness on a 01' 02' dbc engine ? Or does it have to be same year

I just don't want to mess with DBW and pedal

[zebra]

not positive, but i don't think you can. i know the computer pinouts/plugs were different (blue/red on older; blue/green on new), and ain't the instrument cluster interfaced a different way? i only put an 01 engine in a 99, so i just used an 01 harness, so i ain't the expert here