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

12,625

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 of 1 people found this 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 68,742 nationwide Sierra 1500 listings starting at $1,800.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,230
#2 John Saffrahn
John Saffrahn
Reputation 3,640
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,330
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,952 Great Deals out of 183,197 listings starting at $1,495
Used Ford F-150
2,152 Great Deals out of 193,913 listings starting at $290
Used Toyota Tundra
450 Great Deals out of 34,799 listings starting at $2,500
Used Dodge Ram 1500
419 Great Deals out of 10,970 listings starting at $1,000
Used Toyota Tacoma
555 Great Deals out of 43,264 listings starting at $1,995
Used GMC Yukon
418 Great Deals out of 20,516 listings starting at $1,495
Used Chevrolet Tahoe
581 Great Deals out of 33,058 listings starting at $1,500
Used Ford F-250 Super Duty
334 Great Deals out of 44,557 listings starting at $1,450
Used Chevrolet Camaro
358 Great Deals out of 31,417 listings starting at $2,400

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
83 Great Deals out of 44,256 listings starting at $23,368
2016 GMC Sierra 1500 For Sale
90 Great Deals out of 3,531 listings starting at $17,670
2015 GMC Sierra 1500 For Sale
90 Great Deals out of 4,266 listings starting at $16,291
2014 GMC Sierra 1500 For Sale
91 Great Deals out of 4,216 listings starting at $13,995
2013 GMC Sierra 1500 For Sale
55 Great Deals out of 1,948 listings starting at $8,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.