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Generation III Internal Engine 1997-2006 LS1 | LS6
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Old Jan 14, 2009 | 01:01 PM
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ok I have a 99 gmc sierra with a 4.3L v6 and I've been looking to swap for a v8. The only problem is figuring out what kind I want, I know that the easiest way would be to get a 5.3L from a truck like mine since it would be a direct swap, but I've also been flirting with the idea of putting in an ls1 or lt1 in that badboy. So my question to you is wich motor is easier and much better to swap for and how exactly would I do it???

I appreciate your thoughts...thanks
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Old Jan 14, 2009 | 01:57 PM
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Originally Posted by memo_8
ok I have a 99 gmc sierra with a 4.3L v6 and I've been looking to swap for a v8. The only problem is figuring out what kind I want, I know that the easiest way would be to get a 5.3L from a truck like mine since it would be a direct swap, but I've also been flirting with the idea of putting in an ls1 or lt1 in that badboy. So my question to you is wich motor is easier and much better to swap for and how exactly would I do it???

I appreciate your thoughts...thanks
Neither, swap in a 6.0 LQ4/LQ9. It would be the exact same swap as the 5.3.
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Old Jan 14, 2009 | 02:51 PM
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Agreed. LQ4/9 swap would be your best bet. Fairly cheap as far as LS style motors go as well.

LT1 wouldn't be worth it, too much work for nothing more as far as performance.
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Old Jan 14, 2009 | 05:57 PM
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go with the 6.0.
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Old Jan 14, 2009 | 09:05 PM
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6.0!!!!! def there a good motor!!!
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Old Jan 14, 2009 | 09:15 PM
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+5 for the 6.0!
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Old Jan 14, 2009 | 10:09 PM
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Wow thanks to everybody for the input!!

I'll mos def consider the 6.0.

Quick question tho, will it be a direct swap for everything besides the PCM and wiring harness?
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Old Jan 14, 2009 | 10:17 PM
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Originally Posted by memo_8
Wow thanks to everybody for the input!!

I'll mos def consider the 6.0.

Quick question tho, will it be a direct swap for everything besides the PCM and wiring harness?
Not sure, you'd probably have to hit up the conversion section for that.
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Old Jan 14, 2009 | 10:30 PM
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iIf you go to the very top of the page and click on the performance trucks tab you'll find alot more info about what you're trying to do. Lots of truck motor swapping going on there. Your same user name and password will work there too.
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Old Jan 15, 2009 | 05:03 PM
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6.0 all the way
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Old Jan 15, 2009 | 05:06 PM
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6.0 is what you want! Its what I'd get
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