fuel mileage

5

Asked by Mar 14, 2010 at 12:24 AM about the 2003 GMC Sierra 1500

Question type: Car Customization

so, im trying to get as much fuel mileage of out my truck as possible. its a '03 4x4 extended cab with 3.73 front and rear gears, k&n cold air intake and cherry bomb exhaust. i've got 285/50/r20 nitto dune grapplers on it. i'm getting about 15mpg on the highway. any suggestions?

2 Answers

8,600

Switch to a smaller street only tire, change your gears, use a synthetic oil, keep the right tire pressure, get rid of dead weight, run tonneau cover, and buy a programmer.

350

be happy with 15 thats good.

Your Answer

Add photo

Related Questions

  • Aftermarket upgrades 3 answers

    I'm considering installing an aftermarket tuner, a cold air intake, and an exhaust system in order to improve my gas mileage. Will these upgrades really improve my gas mileage? Could these upgrade...

    2016 GMC Sierra 1500 SLT Double Cab 4WD

    -

    Car Customization

  • Trans swap? 2 answers

    My truck has the 700r4 trans and I cant get one but I did find both the 350 and 400 at my local juckyard at a price that I can afford. Now will either of these work in my truck? I know after searching...

    1990 GMC Sierra 1500

    -

    Car Customization

  • Gas mileage/performance chip for 99 Sierra classic w/5.7 2 answers

    So, I've been searching the Internet for a chip to help my 99 Sierra get better gas mileage and haven't really found anything other than chips that are obviously a scam or crap from eBay. My quest...

    1999 GMC Sierra 1500 SLT 4WD Extended Cab SB

    -

    Car Customization

  • Does low oil pressure cause fuel to burn lean? 3 answers

    I had to replace my motor a year ago. I got a used engine. From the beginning the check engine lights comes on after about 40 miles. The oil pressure when hot idles at 10 ksi, when running on 8 cyli...

    2008 GMC Sierra 1500 SLT Crew Cab 4WD

    -

    Maintenance & Repair

  • Traction control and fuel management 13 answers

    If traction control is disengaged, vehicle acts the exact same way as if connected. Should there be a notable difference?

    2011 GMC Sierra 1500 SLE Ext. Cab

    -

    General

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,500
#2 John Saffrahn
John Saffrahn
Reputation 3,150
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,770
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,751 Great Deals out of 150,216 listings starting at $1,259
Used Ford F-150
3,475 Great Deals out of 207,573 listings starting at $1,273
Used GMC Sierra 2500HD
140 Great Deals out of 13,629 listings starting at $1,500
Used Dodge Ram 1500
545 Great Deals out of 13,072 listings starting at $1,800
Used Toyota Tundra
699 Great Deals out of 28,803 listings starting at $2,500
Used Chevrolet Silverado 2500HD
387 Great Deals out of 28,807 listings starting at $2,295
Used Toyota Tacoma
800 Great Deals out of 34,292 listings starting at $2,988
Used GMC Yukon
544 Great Deals out of 17,693 listings starting at $1,777
Used Chevrolet Tahoe
1,083 Great Deals out of 32,100 listings starting at $1,495
Used Ford F-250 Super Duty
451 Great Deals out of 43,257 listings starting at $2,995
Used GMC Sierra 1500HD
8 Great Deals out of 124 listings starting at $4,988
Used Chevrolet Camaro
629 Great Deals out of 39,686 listings starting at $2,995
Used GMC Canyon
152 Great Deals out of 8,266 listings starting at $2,995
Used GMC Sierra 2500
187 listings starting at $5,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
6 Great Deals out of 28,512 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
77 Great Deals out of 7,006 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
205 Great Deals out of 4,729 listings starting at $15,988
2014 GMC Sierra 1500 For Sale
212 Great Deals out of 4,501 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
157 Great Deals out of 2,613 listings starting at $9,994