have an 03 gmc sierra 2500hd has 276000 miles on it did cylinder contribution test all cyl. came uo about the same no real diffrences but smokes at all times with no loss of power does have tuner

Asked by johngttnitdn2 Aug 03, 2015 at 03:56 PM about the 2003 GMC Sierra 2500 4 Dr SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

smokes at all times but runs good no injector codes contribution all pretty typical 678 to 681

1 Answer

70,925

start with trying this > Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart

Your Answer:

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 2500HD
17 Great Deals out of 1,640 listings starting at $9,988
Used Chevrolet Silverado 2500HD
16 Great Deals out of 1,285 listings starting at $8,995
Used GMC Sierra 1500
148 Great Deals out of 7,258 listings starting at $3,950
Used Ford F-250 Super Duty
24 Great Deals out of 1,204 listings starting at $7,995
Used Chevrolet Silverado 1500
202 Great Deals out of 5,975 listings starting at $2,975
Used Ford F-150
321 Great Deals out of 14,968 listings starting at $1,712
Used Chevrolet Silverado 2500
2 listings starting at $12,500
Used Dodge RAM 2500
23 listings starting at $9,975
Used GMC Yukon
16 Great Deals out of 929 listings starting at $1,225
Used Chevrolet Silverado 3500
4 listings starting at $29,975

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.