5.3L gas milage

[truckguy04]

What kind of gas milage does a stock 1500 silverado ext. cab with a 5.3L engine get in the city and on the highway?
Thanks
Brian

[jl_tulane]

In my '03 Silverado 1500 ext. cab short bed, I get just under 15 in the city and about 18 and a half on the highway. I am installing K & N FIPK gen 2 this weekend. I'll let you know how much that helps.

[huminski]

2004 5.3 with 13000 miles, gibson exhaust, and modified air intake, MAF, and filter box gets consistent 20-21 on the highway, averages 17-19 overall which includes the occasional 3 mile trip towing the boat to the ramp.

[chuckwi11]

My stock 5.3 averages about 18 mpg with a 80 mile daily commute and limited city driving.

I just installed a K&N FIPK gen II and am having the muffler replaced with a Flowmaster 52. I'll post back mileage after the mods are done.

[truckguy04]

that doesn't sound that bad, that's about what i get with my blazer now, which i'm gonna sell, and buy a '02 or '03 silverado. i would be interested to see how a k&n air intake affects the gas milage. please post how the gas milage changes after this modification.

[vnotaro]

Originally Posted by truckguy04

that doesn't sound that bad, that's about what i get with my blazer now, which i'm gonna sell, and buy a '02 or '03 silverado. i would be interested to see how a k&n air intake affects the gas milage. please post how the gas milage changes after this modification.

I have an '01 with the 5.3 and have installed a K&N FIPK and removed the MAF screen. Highway mileage instantly bumped up to right around 20 mpg. Just installed a Gibson stainless sideswept catback dual exhaust and am now getting between 21-22 mpg on the highway.

[pall]

I'm getting 19/24 with my 5.3 I have a flew mods gibson headers,gibson Dual Sport Exhaust,removed screen from MAF,mod air box with K+N and Hypertek tuner.

[zed332l]

I been getting between 9-10 consistantly what am i doing wrong?? Any Ideas? I do have the predator tune installed however, I was getting the same before the tune only on 87 octane instead of 93. The truck does scream....

[J-Ri]

Originally Posted by zed332l

I been getting between 9-10 consistantly what am i doing wrong?? Any Ideas? I do have the predator tune installed however, I was getting the same before the tune only on 87 octane instead of 93. The truck does scream....

I'd guess what you're doing wrong is keeping the go pedal too close to the floor. Drive 'er easy for a tank and see how you do. You're getting less than I do on my 350!

[Chevy-SS]

Originally Posted by pall

...removed screen from MAF................

I see a couple of you mention this mod to improve mileage. I have a '98 Silverado K1500 5.7 Vortec. Is this something I can do to help my mileage? If so, how do you do it?

Thanks