GMC 5.3L Vortec Engine with Active Fuel Management

Discussion in 'Trucks and Trailers' started by joed, Jan 23, 2010.

  1. joed

    joed LawnSite Bronze Member
    Messages: 1,193

    Does anyone own a GMC Sierra or Chevy Silverado equipped with the 5.3L Vortec engine and active fuel management. If so, what type of fuel economy are you getting? I was considering getting an new GMC Sierra with this set-up. Fuel economy figures are impressive but they come from government ratings which are a lot different than real world figures. Any help would be appreciated. Thanks.
  2. rungreen

    rungreen LawnSite Member
    Messages: 211

    I have one best I ever get 16mpg. The dealer told me I would get close to 20 but average is probably 13-14.
  3. joed

    joed LawnSite Bronze Member
    Messages: 1,193

    Thanks for the response Rungreen. I currently have a 2000 Sierra 2500 with the 6.0L engine. We usually get 13 mpg in city driving with it. I'm looking for another truck, more for personal use than anything else, but I want good fuel economy. I've narrowed my choices down to:
    Toyota Tacoma with the V6

    The tacoma is a nice truck but up here in Canada, it's more expensive than the Sierra and F150. Maybe the 4.8 Vortec would be a better choice or the F150?
  4. Cuttinitclose

    Cuttinitclose LawnSite Bronze Member
    Messages: 1,015

    I have a Chevy w/ the 5.3 but it is Flex and not AFM. It gets around 18mpg on regular and 16 w/ flex.
  5. lawnboy dan

    lawnboy dan LawnSite Gold Member
    Messages: 3,711

    the toyota v6 dosnt get any better mpg than a chevy v8. i know cause i have both. the 5.3 is an awesume engine
  6. rcslawncare

    rcslawncare LawnSite Bronze Member
    Messages: 1,684

    Go with the full size, nice to have that extra truck that could handle a trailer if need be.
  7. joed

    joed LawnSite Bronze Member
    Messages: 1,193

    Thanks for the information. This is what I needed to hear. I don't know how prices are down in the U.S. but here Toyota is crazy with its prices for trucks. They quoted me $36 000 for the double cab 4WD V6 toyota tacoma. You can get the Sierra or F150 for about $5000 less.

    Do you have the 5.3 vortec? If so, what do you get for fuel economy?

    Does anyone drive a 2009 Ford F150 with the 4.6 V8 3 valve engine? If so, what's the fuel mileage on that.

  8. clinicalengineer

    clinicalengineer LawnSite Member
    Messages: 69

    Mine is a year and a half old and i love the thing.
    Mileage wise highway ranges from 16-19mpg depending on driving style
    Towing the equipment is around 13-14mpg

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