why does my 1999 gmc 1500 new body style and the engine is surging and when its warm and bring it to a idle it still surges.

10

Asked by Jan 10, 2016 at 11:07 AM about the 1999 GMC Sierra 1500

Question type: Maintenance & Repair

in the winter my pick up has been doing this for 5 years now. im finally trying
figure out what the problem is. when i first start it its really bad. my pick up
revs up to 5000 rpm then suddenly drops to 500. ive put in a new egr valve,
throttle positioning sensor and i replaced the plugs and wires. the only thing
that happened was it doesn't die anymore.

6 Answers

19,780

Did you try cleaning or replacing the ( IAC ) Idle Air Control ) valve or Mass Air Flow sensor depending on which one your vehicle has.

2 of 2 people found this helpful.
10

it runs fine when im driving. its just when i slow down to a stop and it idles like shit.

1 of 1 people found this helpful.
10

now my pick up is making a screaming noise when i give it throttle

485

TPS

10

I did that and it did nothing

5

my 2005 Vortec 5.3 did the same thing and I researched it on youtube your truck sounds a lot older than mine but I went and bought a can of mass air flow sensor cleaner, and very carefully removed the fine screen with an electrical connector that connects to it and sprayed it through let it dry sprayed it again several times, and then very carefully reassemble it and it did take care of the problem. I hope this will help you if not try YouTube there is a lot of information on there, best of luck:-):-)

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 10,796 nationwide Sierra 1500 listings starting at $2,995.

Postal Code:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,340
  • #2
    John Saffrahn
    Reputation
    3,690
  • #3
    Glenn Clingenpeel
    Reputation
    3,380
View All

Related Models For Sale

Used Chevrolet Silverado 1500
178 Great Deals out of 10,970 listings starting at $1,288
Used Ford F-150
449 Great Deals out of 10,155 listings starting at $1,400
Used Toyota Tundra
24 Great Deals out of 870 listings starting at $2,500
Used Dodge Ram 1500
46 Great Deals out of 523 listings starting at $1,300
Used Toyota Tacoma
30 Great Deals out of 847 listings starting at $5,990
Used GMC Yukon
16 Great Deals out of 931 listings starting at $3,000
Used Chevrolet Tahoe
3 Great Deals out of 672 listings starting at $4,995
Used Ford F-250 Super Duty
22 Great Deals out of 891 listings starting at $6,800
Used Chevrolet Camaro
3 Great Deals out of 764 listings starting at $10,929

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
23 Great Deals out of 5,248 listings starting at $27,385
2016 GMC Sierra 1500 For Sale
26 Great Deals out of 270 listings starting at $20,988
2015 GMC Sierra 1500 For Sale
57 Great Deals out of 585 listings starting at $18,994
2014 GMC Sierra 1500 For Sale
41 Great Deals out of 502 listings starting at $17,995
2013 GMC Sierra 1500 For Sale
30 Great Deals out of 248 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.