Gas mileage/performance chip for 99 Sierra classic w/5.7

Asked by Apr 16, 2016 at 10:15 PM about the 1999 GMC Sierra 1500 SLT 4WD Extended Cab SB

Question type: Car Customization

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
question is, does anyone know of a programmable
chip that I can install for a canned tune, or am I just
going to have to suck it up and get it tuned? I would
like to avoid shelling out the $600 for a professional
tune. Do they even make a canned tune setup? I
already have a true dual magnaflow exhaust and
that helps but I live in Tucson and only get about 10
MPG so that sucks, but if I could get about 3-4
better mpg I'd be happy. Any help would be greatly
appreciated. Thanks and CHEERS!

2 Answers

10,655

Depending on your skill set you could do all the things you are asking.I don't recommend "CHIPS" one size tunes nothing! modification, but what ever. If you look there are lots of flash tools available to tune your PCM. If your serious about engine management start learning, Goggle Mega Squirt. That massive airplane graveyard still in Tucson?

1 out of 1 people think this is helpful.
Best Answer

Thanks for the quick reply! Yes the boneyard is still here haha. I'll definitely look into the mega squirt program. How does it work? Is it like a trial and error thing or is there some sort of tutorial?

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 58,048 nationwide Sierra 1500 listings starting at $2,495.

ZIP:

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 2,760
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,681 Great Deals out of 149,054 listings starting at $1,800
Used Ford F-150
3,395 Great Deals out of 205,576 listings starting at $1,273
Used Dodge Ram 1500
534 Great Deals out of 12,951 listings starting at $1,800
Used Toyota Tundra
682 Great Deals out of 28,313 listings starting at $2,500
Used Toyota Tacoma
790 Great Deals out of 33,560 listings starting at $2,988
Used GMC Yukon
537 Great Deals out of 17,581 listings starting at $1,777
Used Chevrolet Tahoe
1,091 Great Deals out of 31,950 listings starting at $1,495
Used Ford F-250 Super Duty
478 Great Deals out of 42,814 listings starting at $2,850
Used Chevrolet Camaro
665 Great Deals out of 39,408 listings starting at $3,495
Used GMC Sierra 2500
4 Great Deals out of 184 listings starting at $6,990

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
6 Great Deals out of 27,869 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
75 Great Deals out of 7,132 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
200 Great Deals out of 4,666 listings starting at $15,999
2014 GMC Sierra 1500 For Sale
203 Great Deals out of 4,425 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
148 Great Deals out of 2,576 listings starting at $10,995