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Discussion Starter #1
I know this is somewhat off topic but I thought you guys might be able to help out. My cousin is looking for a good forum to find power advice on his 03' 5.3. He is looking for PCM advice and other performance info.

Thanks
Brandon
 

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Discussion Starter #3
We have been out to fullsizechevy but it has been difficult to pull good 5.3 info. I will give that a try. Thanks
 
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