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GM 6.0 Vortec and gas mileage

Discussion in 'Truck & Equipment Repair' started by pmdheadhunter, Jan 29, 2011.

  1. pmdheadhunter

    pmdheadhunter Junior Member
    Messages: 7

    looking to see what remedies might be out there for a GM 6.0 Vortec motor to increase gas mileage.
    I have 2 of these: Escalade which I upgraded the exhaust (cat back) and put a K&N air filter on. Increased mileage about 1.5 (13 to 14.5 daily type driving) and seemed to offer more power. Did this a couple years ago. The other is on a new (to me) 2004 GMC Sierra 2500 HD. Currently getting about 12 (tough to call with plow & saltbox on/in). Any ideas you guys have tried that worked would be appreciated.

  2. keitha

    keitha Senior Member
    Messages: 133

    Low cost / free , air filter, fuel filter, plugs and wires.
    AIR Pressure in tires, easy start offs and SLOW down.
    I have a 07 2500 cc 4x4 w/ 6.0l 13mpg at something over posted limit, keep it at 65 and
    I can get 15.

  3. 496 BB

    496 BB Senior Member
    Messages: 789

    Your not going to do much better in either. Its heavy and thats the way it goes. Be happy. I get 7 in my HD and bout same in the K20.

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,362

    You should feel real lucky you got 1.5 out of a cat-back and a K+N, hard to believe but whatever.