2010 silverado z71 gas mileage

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by buffalo bill, Jan 11, 2010.

  1. buffalo bill

    buffalo bill New Member

    New to the GM truck world, first GM truck, used to drive f-150's but decided to try a gm.. also new to forum.
    Question, I have the 5.3 eng and I am wondering what kind of mpgs people are really getting in their newer trucks with the fuel mgt system both in 2 wh and 4wh, thanks for any info.... cold here in buffalo
  2. Shooter

    Shooter Rockstar 100 Posts

    My co-worker has a 2008 silverado 1500 Z71 and he gets on average around 14mpg, mostly city driving.
    I have a 2009 2WD and I am currently getting about 15.5 with mine (with 480 lbs of sand in the back for traction.) When I first bought it I was getting on average 16.5-17mpg empty with it. I too drive mostly city stop and go miles.
    On the last trip over 500 miles I put on it before winter here in buffalo I got 22mpg with the cover on the back.
    We both have the 5.3L motors in our trucks as well. He is not real happy with his mileage, but I have seen him drive and I am surprised he gets that much mileage out of it.<LAUGH>
  3. times1

    times1 New Member

    09 Silverado LTZ 4X4 Gas Mileage

    My truck has 5.3V8 with less than 5K miles and gets about 15 MPG combo city hwy miles. I drive mostly in 2WD, until recent 20" snowfall! The 4X4 was awesome!!!
  4. BigBlueLB756

    BigBlueLB756 Rockstar 100 Posts

    Mostly around town, in 2WD or Auto = 14.6mpg so far. Barns aren't too aerodynamic, are they?
  5. XS ive

    XS ive Rockstar 100 Posts

    My 08 can pull 14-17 around rural areas. What kills the mpg is idling to warm up.
  6. rotaryenginepete

    rotaryenginepete Rockstar ROTM Winner 100 Posts

    i pretty much drive everywhere in AUTO. if i drive aggressive like i normally do, it averages 14-16mpg city/hwy combined. when i drive nice and slow it'll get about 18mpg as advertised if its in just 2WD i get about 1-2mpg better, and in full time 4wd about 1-2mpg less.

    now i just finished installing pulstar spark plugs, bully dog triple dog GT timer, and a magnafow exhaust. these in addition to my K&N CAI get me 26mpg on the hwy which is freakin awesome!:surprised: but this week i am throwing on my lift, so that might come down a little bit. :sign0021:
  7. wayned

    wayned Rockstar 100 Posts

    I get 19 more or less .I live in fl not to manny hills. 5,3 2wh rc o7nnbs
  8. allterrain

    allterrain New Member

    my last 80 mile highway trip - 19mpg (set cruise at 60mph for most of the trip)
    city driving - horrendous 10 mpg in the cold freezing temp.

    2009 Sierra SLT Crewcab (with 1,200 miles) - 5.3 4x4 with tonneau cover... always set to 2wd mode

    Please keep posting...i would like to see what mileage the newer 2009/2010 5.3 crewcabs with 6 speed tranny are getting.

    The mileage I'm getting is no where close to the posted "Canadian" window sticker mileage. It's 16city/23hwy. Does anyone know what the 2009 window sticker mileage is?

  9. Shorty 71

    Shorty 71 Epic Member 5+ Years ROTM Winner 1000 Posts

    I'm getting an impressive 14.2:rofl:, i have a heavy foot though:) It's still worth it to me, i'm not gonna let "the man" tell me what to drive:no:
  10. jake's silverado

    jake's silverado Epic Member 5+ Years 500 Posts

    MPG my experience with 2 new body style 4X4 set ups

    So I owned a 2007 5.3, Z71, 3.73 gears, 4 spd tranny, ( we had probably one of the first ones in our area as the dealer only had a few days and we leased t it NOV 2006) and in the winter left it in auto and seemed to get a respectable 17 city and 24 hwy. When i controlled my right foot(I actually mean use cruise) I tested it on hwy 401 in Southern Ontario cruise set @ 62mph for 30 miles and got 27mpg !! I was shocked.

    Now I have a 2009 5.3 L, 3.42 gears, 6 speed tranny. I purchased it used with about 5000 mi on it. I put on the DIC upgrade and when I looked at the average MPG that the truck did it came up as 17mpg. Now I know they towed a 7000lbs trailer a few times this summer and since I have owned it I'm probably gettin 14.5 mpg city and 20 hwy. I will give this truck the same 30mile test and see what I get. Now don't get me wrong I dumped my caddy SRX to get back into a truck and I love the Silverado but I"m not overly impressed with the MPG on the 2009. I would have expected atleast the same performance out of this truck as we had out of the 2007, IMO.

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