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Bad MPG

Discussion in '1992-Present Chevy & GMC models' started by Bhintz, Mar 4, 2005.

  1. Bhintz

    Bhintz 1/2 ton status

    Joined:
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    Location:
    Roswell, Ga
    I have a 00 Z71 I got in the summer, when I got it i was getting 15/16 city/hw now is 12/14 I changed plugs, wires, air filter, and even put a new exhaust (flowmaster) and nothing no change is there anything else I can do
     
  2. sled_dog

    sled_dog 1 ton status

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    Location:
    Austin, TX
    no service engine soon light? My 97 has gotten crappy mileage most of the time I've had it. It has 2 bad O2 sesnors.
     
  3. Bhintz

    Bhintz 1/2 ton status

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    Location:
    Roswell, Ga
    nope no light I was thinking it could be the o2 sensors
     

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