4.8 to 5.3 truck

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Nov 12, 2008 | 04:49 PM

Ihasfip

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From: Georgetown, Texas

4.8 to 5.3 truck

I know this isn't a much of a hybrid. But I have a buddy that has a 99 gmc sierra that has the 4.8 in it. In the midst of changing a knock sensor he twisted of the boss that the knock sensor threads into. So block is trash now. He was going to but a 5.3 in it. What all does it require to put a 5.3 in it? Is it just a tune and be done? Thanks for any help. I know they are essentially the same motor minus stroke. I did search but couldn't come up with a solid answer and also searched google.

D

Nov 12, 2008 | 06:15 PM

nobreaks254

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Like you said, its the same motor with different stroke. Should be just a direct swap as far as I know.

Nov 12, 2008 | 06:32 PM

GMCtrk

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direct swap everything over. But don't even bother with the 5.3 from the 4.8. Go for the 6.0.

Nov 12, 2008 | 06:44 PM

LUMPY85

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i second the 6.0, it wont cost much more if anything, may even be less.

Nov 12, 2008 | 08:56 PM

poconojoe

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6.0's cost over twice as much as 5.3's

Nov 12, 2008 | 09:19 PM

LUMPY85

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ok ill rephrase it, around here you can get a 6.0 for the same or cheaper than a 5.3. i just looked it up to make sure i wasnt being retarded

Nov 13, 2008 | 07:33 AM

slow

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wow, here 6.0's pull good money, 5.3's are cheap.

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Nov 13, 2008 | 08:55 AM

Ihasfip

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From: Georgetown, Texas

5.3 here is 450$ intake to oil pan. lq4? 99-02 non- aluminum headed 6.0 goes for 900$ lq9? 03-05 with low miles (40k-60k) miles is 1100$, or high miles (100k+) for 900$. So... He might go ahead and get the 6.0.

D