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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
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Old 02-06-2010, 01:21 PM
CF Beginner
Join Date: Feb 2010
Posts: 4
Default 5.3

I have a 2004 Chevrolet Silverado 1500 Z71 with a 5.3 Vortec V8, the engine is going to need replaced. What year, model, etc. 5.3 will fit in my truck???

Like will a 5.3 out of a 2001 Silverado or a 2002 Silverado fit in my truck without ANY modifications to transmission OR to the wiring harness/computer?

And could I put a 5.3 out of like a Tahoe, or Avalanche, or Trailblazer... etc.

thanks, josh
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Old 02-06-2010, 02:56 PM
silverado08's Avatar
CF Junior Member
Join Date: Sep 2009
Location: missouri
Posts: 82

all the 5.3 engines are the same except that from 03 and up the are drive by wire. when replacing it you can put a different size in there. the 4.8 and 6.0 engines will be good for thought too. dont go any new than an 07 though

1997 Corvette
2008 Silverado 400HP +120 Shot NOS
2009 G8 GT 440HP
2003 Avalanche
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Old 02-06-2010, 08:18 PM
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Join Date: Nov 2009
Location: sacramento,ca
Posts: 1,042

imo, put a 6.0 in there pending on your gear ratio.
You make life rough on your motor, your motor will make life rough on you...
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