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Discussion Starter · #1 ·
I just finished swapping a low miles 4.8 from an 05 silverado 2wd into my 02 z71 that had a 5.3 that developed a severe knock around 290k miles.

I have read that a tune will be required for the 4.8, who should i take it to for that and what does that usually cost? I live in Tucson and I'm thinking there is a shop that can do it or is that something i take it to a gmc/chevy dealer for?

Is it ok to drive it to the shop or should i tow it there for the tune? It starts up strong and seems to run good but there is a high pitched tick sounds like its coming from the top of the motor on the drivers side.... Might be the exhaust manifold because i need a dorman repair bracket for the bolt at the back by the #7 cylinder. Or is it because the timing is off due to he tune?
 
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