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JAMMINJAMIE
05/11/2009, 11:41AM
About: 2004 Chevrolet Silverado 1500 Z71 Ext Cab Short Bed 4WD
HORSEPOWER OF THE 5.3
HOW MUCH HORSEPOWER DOES THE 2004 5.3 L HAVE
Josh5633
05/11/2009, 2:54PM
i had a 2006, and it originnally came with like hp in the high 200's. but we added an air filter and dual exhaust, and we were cruisin around the mid to high 300's in horsepower
RadoBoys
07/28/2009, 5:31AM
I have a 2005 silverado and bought it off the lot...i think i have ablout 300 hp...
Camaro_96
10/12/2009, 7:49PM
most 5.3s have 295 horsepower but in 2005 they had a 5.3 h.o. only 25% of the trucks made in 05 had that engine and it had 310 horsepower but now the newer 5.3s have 315
XJR_2260
11/21/2009, 10:22PM
The 99-01 5.3L had 270, the 02 had I think 285 and 03-06 have 295 and the 07 and up are at 315.

