Question about 1998 GMC Suburban

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Eating gas my 98 suburban 2500 4x4 with a 6.7l seems to be going tough gas faster then I can put it in

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Hey there Gator,

From Florida? I was on the left coast for a while, Tampa, Clearwater, St. Pete. Anyway, to biznis.

As a fellow operator of a large vehicle, I feel your pain.eating gas - f94aa9d.jpg

Keep in mind, this is a BIG Vehicle with a BIG Engine (6.6liter equals about 400 c.i., yours is 6.7).

That said, if this is a recent development, please comment me back with any event or symptoms that may ahave happened at the same time. In the meantime, there are things to check.


  • Tires at proper pressure
  • Air filter clean (or new)
  • Get that big engine tuned up (new plugs). Think about a High Energy Ignition Coil)
  • Oil change and lube
  • Brake adjustment (Emergency brake too)
  • Keep track of your mileage, document trips too to check on increase or decrease.
Practices that increase mileage:
  • Keep it between 55-65 on highways
  • Don't gun it from a stop. Jack Rabbit starts EAT fuel in a heavy vehicle like a Suburban.
  • Plan your trips to consolidate travel
  • Use A/C sparingly any time you aren't at highway speeds.
  • Empty the vehicle of unnecessary cargo (lighten it up)
  • If you use drive-thru's, turn off engine if waiting in a slow line. For every two minutes waiting, you're losing nearly a mile per gallon
Anyway, let me know,

Posted on Jan 19, 2009


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