idle rough
355

Asked by csz4296 Nov 15, 2012 at 07:40 PM about the 1998 GMC Sierra 2500 2 Dr K2500 SLE 4WD Extended Cab LB HD

Question type: Maintenance & Repair

my truck is idling really rough it dosent seem bad when im driving but when i come to a stop it shakes really bad , or when i first start it  , what can it be ??

3 Answers
69,055

John answered 11 years ago

Is the check engine light on after you start it? Vacuum leak, worn spark plug(s), bad idle air control and many other possibilities. Start by checking the manifold vacuum.

4 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Sierra 2500

Looking for a Used Sierra 2500 in your area?

CarGurus has 3 nationwide Sierra 2500 listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search GMC Sierra 2500 Questions

CarGurus Experts

  • #1
    Rowefast
    Reputation
    180
  • #2
    Gene Arnett
    Reputation
    170
  • #3
    mikeatpriestlake
    Reputation
    70
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
143 Great Deals out of 8,222 listings starting at $3,000
Used Chevrolet Silverado 2500HD
25 Great Deals out of 1,696 listings starting at $3,000
Used Ford F-250 Super Duty
26 Great Deals out of 797 listings starting at $3,590
Used Chevrolet Silverado 1500
204 Great Deals out of 8,074 listings starting at $3,000
Used Ford F-150
325 Great Deals out of 13,693 listings starting at $3,800
Used Chevrolet Silverado 2500
1 listing
Used Ford F-250
6 listings
Used Dodge RAM 2500
28 listings starting at $9,900
Used Toyota Tacoma
43 Great Deals out of 730 listings starting at $9,975

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. Content will be removed if CarGurus becomes aware that it violates our policies.