GMC 2500 hd duramax 6.6

Asked by Jan 15, 2016 at 10:17 PM about the 2005 GMC Sierra 2500HD

Question type: Maintenance & Repair

After driving it about 30 miles  to work my
oil pressure drops to 0 .checked the oil oil
level none on the stick. I put 1/2 gal to top it
off. O. The way home it dropped again. No
oil on the ground, truck not smoking, tail
pipe is dry, no oil under the trk. Where is the
oil going? What might be causing this?
Thanks for the help and info.

2 Answers


Oil does not just vanish,there are a few things to check,your coolant,your exhaust,and front and rear seal in engine,check your tail pipe for raw oil sute by taking a rag and wiping inside tail pipe,gas sute will wipe off your finger which is normal in the exhaust,but oil sute will not wipe of your finger.


check oil before you start engine. for accurate reading. if ran, wait 15 min while its off and check it.

Your Answer

GMC Sierra 2500HD Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet Silverado 2500HD
450 Great Deals out of 29,883 listings starting at $2,000
Used Ford F-250 Super Duty
489 Great Deals out of 47,261 listings starting at $1,817
Used GMC Sierra 1500
1,305 Great Deals out of 63,546 listings starting at $1,200
Used Chevrolet Silverado 1500
3,077 Great Deals out of 163,286 listings starting at $1,500
Used Dodge Ram 2500
154 Great Deals out of 5,447 listings starting at $2,995
Used Ford F-350 Super Duty
395 Great Deals out of 26,340 listings starting at $3,900
Used Ford F-150
3,370 Great Deals out of 226,796 listings starting at $1,250
Used Toyota Tundra
714 Great Deals out of 34,860 listings starting at $1,995

Used Cars For Sale

2018 GMC Sierra 2500HD For Sale
6,229 listings starting at $32,139
2017 GMC Sierra 2500HD For Sale
974 listings starting at $27,461
2016 GMC Sierra 2500HD For Sale
6 Great Deals out of 1,101 listings starting at $27,900
2015 GMC Sierra 2500HD For Sale
13 Great Deals out of 1,477 listings starting at $20,995
2014 GMC Sierra 2500HD For Sale
7 Great Deals out of 417 listings starting at $14,499

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.