How many miles to the gallon on an 450 (7.4)GMC suburban?

Asked by May 16, 2018 at 06:44 PM about the 1999 GMC Suburban

Question type: General

2 Answers

217,475

Probably about 12 average.

175,245

Depends on your final drive ratio. I've seen mileage as low as 5 MPG to as high as 18 MPG. The higher the numbers the lower it's geared and the worse the fuel mileage but low end torque is great, the smaller the numbers the better the fuel mileage but the torque is reduced.

Your Answer:

GMC Suburban Experts

  • #1
    ShadetreeMech
    Reputation
    470
  • #2
    Larry Thibert
    Reputation
    440
  • #3
    DilHole
    Reputation
    250
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used Chevrolet Suburban
8 Great Deals out of 548 listings starting at $8,995
Used GMC Yukon XL
9 Great Deals out of 711 listings starting at $7,995
Used GMC Yukon
19 Great Deals out of 1,257 listings starting at $3,950
Used Chevrolet Tahoe
23 Great Deals out of 1,133 listings starting at $2,000
Used Cadillac Escalade
9 Great Deals out of 704 listings starting at $4,200
Used Ford Expedition
8 Great Deals out of 502 listings starting at $7,450
Used Chevrolet Corvette
19 Great Deals out of 1,015 listings starting at $8,376
Used GMC Sierra 1500
70 Great Deals out of 11,769 listings starting at $2,800
Used Jeep Cherokee
97 Great Deals out of 7,333 listings starting at $9,999
Used Toyota Tacoma
28 Great Deals out of 1,532 listings starting at $1,108
Used Ford Excursion
5 listings

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.