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 1998 C2500 gets 13-16 mpg.
My 2005 silverado crew cab /6.0 averages 15.2 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.
I get about 14-16 mpg on my 1999 Chevy Silverado 1500, 5.3L V8
17 city and 24 highway
The EPA mileage estimate for the 2004 Chevrolet Silverado-1500 is 14 mpg in the city, 19 mpg on the 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.
Expect to get around 15 mpg in mixed driving and around 19 highway.
If it has a 305 around 15mpg If it has a 350 13-14