2006 GMC Sierra 2500HD Duramax Allison 6.6

Asked by gizzle90 Nov 07, 2020 at 06:51 PM about the 2006 GMC Sierra 2500HD SLT Crew Cab 4WD

Question type: Maintenance & Repair

I’m buying this 2006 GMC Sierra 2500HD Duramax
Allison 6.6 Diesel Engine and I want to know if i
need to add any specific type of flex fuel or dex fuel
to the engine? I’m not to familiar with Diesel engine
trucks and i want to know if the truck will only need
regular diesel fuel or if i need to add any more
additional fuel to keep it updated from not messing
up on me. If anyone can help with this, thank you.

1 Answer

F_O_R answered 2 years ago

Never put flex fuel in a diesel!!! You use diesel, no other fuel. You may want to use a diesel additive but never, ever use gasoline or gasoline fuel additives.

Mark helpful

Your Answer:

Related Questions

  • 2006 GMC Sierra 2500HD Duramax Allison 6.6 1 Answer

    I’m buying this 2006 GMC Sierra 2500HD Duramax Allison 6.6 Diesel Engine and I want to know if i need to add any specific type of flex fuel or dex fuel to the engine? I’m not to familiar with Diese...

    2006 GMC Sierra 2500HD SLT Crew Cab 4WD

    -

    Maintenance & Repair

  • I have a 2006 GMC 2500 Duramax 1 Answer

    I have a 2006 GMC 2500 Duramax, it will not shut off even when I turned the key off and remove it from the ignition. Also when this happens the windshield wipers and headlights will not turn off ei...

    2006 GMC Sierra 2500HD Crew Cab 4WD

    -

    Maintenance & Repair

  • GMC 2500 hd duramax 6.6 1 Answer

    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 groun...

    2005 GMC Sierra 2500HD

    -

    Maintenance & Repair

  • GMC 2500 hd duramax 6.6 2 Answers

    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 groun...

    2005 GMC Sierra 2500HD

    -

    Maintenance & Repair

  • 2005 GMC Sierra 2500HD 2 Answers

    Does anyone know about how to remove the cabin air filter under the dash on passenger side around HVAC/blower/AC? Also the correct part number of a replacement filter?

    2005 GMC Sierra 2500HD 4 Dr SLE Extended Cab SB HD

    -

    Maintenance & Repair

Own this car?

Share your experience with others.

2006 GMC Sierra 2500HD

Write a car review

Review another car

Shortcuts

Search GMC Sierra 2500HD Questions

CarGurus Experts

  • #1
    Gilbert Tijerina
    Reputation
    490
  • #2
    BoholMark
    Reputation
    460
  • #3
    Marcus Victorius
    Reputation
    380
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Silverado 2500HD
935 Great Deals out of 25,266 listings starting at $3,800
Used GMC Sierra 1500
1,665 Great Deals out of 48,017 listings starting at $2,990
Used Ford F-250 Super Duty
1,344 Great Deals out of 30,189 listings starting at $1,500
Used GMC Sierra 3500HD
240 Great Deals out of 5,670 listings starting at $11,500
Used Chevrolet Silverado 1500
4,424 Great Deals out of 112,180 listings starting at $2,890
Used Ford F-150
6,095 Great Deals out of 142,294 listings starting at $1,650
Used Dodge RAM 2500
44 Great Deals out of 1,070 listings starting at $4,901
Used Chevrolet Silverado 3500HD
365 Great Deals out of 9,215 listings starting at $6,995
Used Ford F-350 Super Duty
819 Great Deals out of 17,230 listings starting at $4,950
Used Toyota Tundra
1,036 Great Deals out of 23,726 listings starting at $1,999
Used GMC Yukon
705 Great Deals out of 10,444 listings starting at $1,990

Used Cars For Sale

2023 GMC Sierra 2500HD SLT Crew Cab 4WD For Sale
4 Great Deals out of 74 listings starting at $65,993
2022 GMC Sierra 2500HD SLT Crew Cab 4WD For Sale
7 Great Deals out of 57 listings starting at $54,498
2021 GMC Sierra 2500HD SLT Crew Cab 4WD For Sale
4 Great Deals out of 43 listings starting at $53,514
2020 GMC Sierra 2500HD SLT Crew Cab 4WD For Sale
5 Great Deals out of 103 listings starting at $42,995
2019 GMC Sierra 2500HD SLT Crew Cab 4WD For Sale
11 Great Deals out of 95 listings starting at $37,502

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.