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  1. #1

    Default 1989 Chevy Cheyanne has 95k miles and is only getting 14mpg...

    What could I do to improve mpg and also what is a good 100,000 mile tuneup for my truck (if you believe in such a thing).

    I had an alignment, new tires, new air-filter.

  2. #2

    Default

    How about spark plugs, wires, cap and rotor, flush and refill cooling system, and service the transmission and transfer case if its a 4x4.

    97 Chevrolet Suburban K1500 5.7L
    78 GMC High Sierra K1500
    Fat, drunk, and stupid is no way to go thru life.

  3. #3
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    Red Z71 Max's Avatar
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    Default

    Like boonduff said and maybe a fuel filter.

    (Scott) Myrtle Beach, SC
    January 2012 ROTM WINNER
    2011 GMC Sierra Z71 MAX 6.2 L w/ Trailering Package
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  4. #4
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    Default

    Also we need to know more info (engine size is it auto or manual, tie size over stock gears: you can get the RPO code from the site here to look it up) since i have owned 8 of these trucks, and had a 1/2ton that go 12 no matter what i did and several that wouldnt get over 15 no matter what i tried. The C/K chassis is an awsome long lasting truck but milage wasnt really its strong suit.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

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