V6 TO V8 SWAP BASICS YOU NEED TO KNOW 99-06 SILVERADO/SIERRA
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- Опубліковано 29 сер 2024
- This is meant as a quick guide to what’s needed to swap a 99-06 Silverado/ Sierra from a V6 to a V8. There are a few things you need to research as GM changed various Minor things throughout 99-06 in wiring, fuse blocks, pcm pin outs and tunes, throttle bodies, emissions, etc… knowing what YOU have and what you further need will make your swap go easier and faster. There are many in depth forums and videos available on swapping these motors. Different years and models will be slightly different then others.
Nice video man I am looking to buy a truck soon and def think I will end up having to swap a v8 in. I would love to find a 4.8 5spd already done
Would be a lot cleaner and easier to have a 4.8 already done up and ready to go. They were common back a few years ago still but people have used them as there intended purposes as trucks, and they’re getting to be fewer and fewer that are worth the money to get road ready. The V6’s tended to be a bit more common, at least in my experience. They do come up in either engine size every once in a while, hope you find one they’re a fun ride and just cool.
Nice third pedal
Hey man I just wrapped up my swap up . I got a 5.3 now with the nv3500 from the truck . Originally was a 4.3 v6 like yours I got a 2005 Silverado and an engine off a 2005 so the wiring would fit right but I can’t turn the truck on without jumping the start , did you run into this issue ? I was told a neutral safety switch or something like that
Also I read where you said you used the v8 clutch’s slave cylinder. Will I have to use a v8 slave cylinder or can I use the v6?
Did u use the 5speed transmission from the V6 and just added a 4.8 clutch?
Yes, the bolt pattern on the bell housings from the small block and the LS platforms are the same (give or take an extra bolt) so everything bolts up fine. I used the V8 clutch it’s slave cylinder.
What's the red wire run along your firewall and under your dash
I hv a 2000 Silverado v6 5 speed manual and I plan to swap to a 5.3 v8. Will I be able to use my same transmission and also will I have to have it tuned because you mentioned something about it being automatic tuned to the engine or will it be ok
The 5.3 is a tad bit different on the crank if I recall. They never sold the 5.3 with a nv3500 so you will have to get the corresponding part numbers for the flywheel and clutch. There is enough aftermarket support it shouldn’t be an issue. I would just double check to be certain to make sure everything fits as it should. As far as the slave cylinder I don’t know if there is a major difference but again I opted to go with matching parts (I bought the clutch pack and slave as a package on rock auto) to make sure it wouldn’t have any issues. I would check the part numbers and if they are different I would change it out for the specified motor. As far as the tune you will need to do it yourself or get someone to do it to adjust for changes in idle and acceleration as well as the functions the engine preforms when it has an auto vs a manual trans. It’s pretty simple and lots of tutorials on UA-cam.
Did you have to change air conditioning hoses ?
I did not hook up the AC yet, the compressors are different if I recall. I do know some of the hoses were different sizes between the two. But there is a 5 year difference between the two trucks. But the V8 and the V6 compressors are mounted differently so you would have to do some changes to the system to make sure everything fits right. Hope that helps.
What’s the part number for the clutch kit
I don’t recall if I have it or not on hand but I can check. I just went on rock auto and ordered for the 4.8 and that’s all that was required.
Hey man I just wrapped up my swap up . I got a 5.3 now with the nv3500 from the truck . Originally was a 4.3 v6 like yours I got a 2005 Silverado and an engine off a 2005 so the wiring would fit right but I can’t turn the truck on without jumping the start , did you run into this issue ? I was told a neutral safety switch or something like that
I had the same issue, I never did find out what it was yet. I just ran a wire with a push button switch to the starter. Not ideal but works as theft prevention. On a serious note however I would check the wiring diagrams, see if your getting a signal to the relay. I kinda ruled it out to be a BCM issue with the swap but I haven’t had a chance to look into it fully. It would be worth looking into the Silverado forums as lots of people have done these swaps, it will at least point you in a direction. I would check any safety switches as it could definitely be a factor. I know this isn’t really an answer but as I said I haven’t played with it since, sorry. Hope you find a way to solve it.
Is there a way you can show me how you ran your push button