I have a 2004 silverado with a 5.3 and i put a cold air intake on it and 3" dual exhaust on it and highway i get 21-22 in there city around 14-15.
10-14 mpg is what my silverado gets
19 hwy 15.5 city
About 12 MPG. HWY. 10 in town
My 2005 silverado crew cab /6.0 averages 15.2 mpg
My 1998 C2500 gets 13-16 mpg.
The Z71 has a 26 gallon tank and can go an estimated 16 MPG city, 19 MPG highway. These are based upon a 2004 Silverado though, I didn't see any Silverados from 1995.
The EPA mileage estimate for the 2004 Chevrolet Silverado-1500 is 14 mpg in the city, 19 mpg on the highway.
I get about 14-16 mpg on my 1999 Chevy Silverado 1500, 5.3L V8
17 city and 24 highway
A 2007 Chevrolet Silverado 1500 gas tank holds 26 gallons of gas. The 1500 gets 14 mpg in the city, and 18 mpg on the highway.
If it has a 305 around 15mpg If it has a 350 13-14
Expect to get around 15 mpg in mixed driving and around 19 highway.