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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

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Comments

  • Chani,

     

    I am a woman who just bought an 05 duramax diesel crew cab. Two words LOVE IT!!!!

     

    I bought it end of Nov, I have almost 4 thoudand miles on it. I use it mostly on the highway, and I am getting 21 MPG. The engine rocks, I drive up in the Mountains at around 7 thousand feet, and their is no difference in power from there to sea level, it goes up hill, staying at 70mph with no problem. Plus all the looks you get from the guys is nice also.. :)

     

    I also haul horses, and will be using my truck to haul my two horse slant steel tow behind. I will also be hauling my friends 3 horse gooseneck. She has an F350 and my truck by far handles better, engine is better and I can haul as much as her.

     

    From what I have been told this years diesel engine has been upgraded and is suppose to be better. The Allison Transmission is the best, never have to down [non-permissible content removed]. I live in snow country the 4x4 is excellent, had to use 4 low once and I was able to go threw 10 feet of snow with no issue.

     

    If I where you, spend the little extra for the chevy, well worth it. Plus I also heard Ford has changed the diesel engine and everyone who has it is not happy, the engine has majot problems.

     

    Good luck.
  • mcblazemcblaze Posts: 6
    My parents recently bought an 04 Crew Cab Short bed...i think they're averaging 15-17 mpg. We had the 6.5 in a 2wd Suburban. Blew the motor out of it over a mishap with minor service (sad story). Had almost 240,000 on that car. She got around 20. This new one slightly less, not a huge deal. Just lookin for any advice how to increase it. Thanks.
  • There are (understandably) a lot of variables in getting good mileage. The LLY does its best mileage at 1880 rpm. The 3.42 rear end gets you at the right rpm at 65mph. If you have the 3.71 or 4.1 rear end you would have to drive much slower to be at 1880 rpm. If good gas mileage is important and you are not towing really heavy loads, then make sure you specify the 3.42 rear end for highway driving. (Not exactly sure I have the decimals right for the rear ends ;-)
  • trbizwiztrbizwiz Posts: 1
    IF YOU HAVE AN LLY THE 8TH DIGIT IN THE VIN WILL BE A 2 IF NOT IT WILL BE A 1 ALSO ANOTHER WAY TO TELL IS IF YOU TRUCK WAS BUILT IN THE SECOND HALF OF 04
  • Just returned from a 1200 mile trip with the following results:

    2001 2500HD, D-max, Allison, Crew Cab, Long Bed, 3.73, K&N air filter, fresh oil change, 82,000 miles:

    From Cincinnati to NYC (eastbound), I averaged about 20.5 mpg unloaded, driving 75-80mph.

    From NYC to Cincinnati (westbound), I averaged about 18 mpg, with about a 2000lb load that stuck above the cab (extra windload) and a completely packed cab, driving 70-75mph.

    I've had no significant problems to date w/ my D-max. I'm concerned about the injector issues but I would think that you would see signs of the problem in your oil if they are leaking within the cylinder heads.

    Also, as a note, fuel mileage is directly proportional to the drivers ability to drive smoothly. When my girlfriend took a turn driving, our mileage dropped about 2mpg because she brakes more often and resultantly accelerates more. I usually let the truck coast down to stops by anticipating them and keeping good distance between me and the next vehicle.

    As an fyi, installing the K&N air filter had no appreciable impact to perceived performance or economy.
  • dugodugo Posts: 1
    Looked at the very noisey Cummins, but Dodge doesn't have a 1.5 cab - just the 2- and 4-door models. Ford had to buy back a bunch of Powerstrokes that ate themselves. So, I went GM. I think it's the ugliest truck ever made, but I like the Duramax.
    MPG ganges in the 17's. I cruise 80-85 to work daily (74-mile round trip). High 17's. I had a 1,200-pound load for over a tankful for those commutes. 17.3.
    My old gas truck had to drop to second to pull a local hill with my race car and trailer. The Duramax? It was in 4th gear before I realized what was going on - that I was almost at the top of the hill with little effort. I looked back to make sure the trailer was still there! I didn't have it in tow mode either. 16.8 MPG with the race car back there.
    Can't argue with the torque. Amazing truck.
    24,000 miles on it now. I'm talking to Banks now - we're going to give it a boost!
  • spademanspademan Posts: 14
    I recently bought a 2001 D-MAX extended cap short box. I added a K&N air filter thinking it would help with mileage. I've read findings contrary to my hopes. Was this a waste of money? Also, is there any place short of a dealership to get clearance lights for these trucks??
  • rtinazrtinaz Posts: 1
    That my 2002 Chevy CC 2500HD CC 4X4 is the best truck I have ever owned and I love it. I don't care what engine number it has or what milage it gets, I love it! I tow alot and I do a lot with it, but it is reliable, always delivers, and is almost as comfortable as my Cadillac - and quite frankly: I love it. If you own one, no matter what the year, you are lucky! And chevy owners rock! You may not sit as high at the stop light, but in the end - you own, in my humble opiion, the best damn truck in the world. Enjoy!
  • luke6luke6 Posts: 1
    we just bought our second duramax.we have owned chevys always.I have sold all the brands with 12 yrs experience.we got 19 to 20mpg unloaded from louisiana to Idaho. We got 16 to 17mpgs loaded with horses or equipment on the highway.My husband got the same 16 mpgs loaded with equipment trailer in town. The Duramax is much Quieter than the cummins and thats a fact,you can not hear our truck in the paper mill you can the cummins.Take a look at your frame on the dodge it is almost half the size as a chevy,look at what holds your steering wheel to the dodge,a pin the size of a pencil. We pass dodges and fords loaded with horses in overdrive every week, half the time its up hill.The dodges injectors do fail as injectors do in all brands,but chevy has an additional 100,000 mile warranty on the injectors with the problem. Dodges are having inpending problems with their transmissions,thats a fact. The fuel mileage really depends on alot of factors,if you get 10 more horses and more torque it may take more fuel,also the driver makes the difference,the tires, the load,the altitude etc...the injector problem has been solved as of mid-2004,in the chevys,the 2001 to 2004 problem injectors are covered,thats a fact.I love our truck.msrp $45,750.00 bought for $37,400.00.loaded.
  • larrydilarrydi Posts: 1
    I have an 2002 hd allison ext cab 4x4 GMC Duramax, my mileage is 17 to 18 on the highway empty, 14 to 16 city empty but when I tow anything my mileage drops considerably. I have a 7,000 lb. 5 th wheel, not a high one ether and get 10 to12 mpg towing it. A double snowmobile trailer, maybe 2,000 lbs loaded and get 14 mpg towing it and a couple of smaller trailers which still get aroud 14 mpg. It seems whenever I put anything on my ballhitch my mileage drops way to much, the reason I purchased a diesel was because I,am always towing something and thought my mileage would hardly change with the smaller trailers. NOT SO. I shifted my allison tranny manualy the other day just to see what the pattern was like, I bought each gear to red line 3200 rpm. 1 st gear was 25 mph, 2 nd was 40 mph, 3rd was 51 mph, OD I didn,t bother with but I know it only does 96 mph top end. I have 3.73 in it also. On the highway I drive about 67 mph at 2000 rpm. Any ideas to improve this would be greatly appreciated. TKS.
  • the_vfoxthe_vfox Posts: 1
    At 23k miles, I get 17-20 unloaded, 10 - 14 towing the 5th Wheel, depending on terrain headwind etc.

    ;)

    2004 Duramax Silverado Crew Cab
  • gemini5362gemini5362 Posts: 17
    I have just purchased a 2005 HD 2500 Crew Cab Silverado it has the duramax diesel engine and 3.73 gears. I am getting 14 to 16 mpg on the interstate running about 75mpg. With the truck unloaded. Last weekend i was pulling a 16 ft flatbed trailer with less than 1000 pounds of furniture on it my mileage dropped down to 11 to 12 mpg is this normal for a new engine I have about 1000 miles on it. I have been told as the engine begins to break in I will see an increase in fuel mileage at what point should I start seeing an increase.
  • laser2laser2 Posts: 1
    I am in the process of ordering a 2005 Duramax and the dealer told me that the lowest rear axle ratio available is the 3.73....anyone know if this is true...??
  • chvylvrchvylvr Posts: 1
    I drive and 2001 2500hd with the duramax and I love This truck. Yes, I had the injector issue and GM promptly replaced then under warranty with the upgraded models. An aggravation yes, but the "quiet diesel" technology was new and things happen. The Allison transmission seems bulletproof as I have dragged a loaded horse trailer 25 miles with the trailer brakes locked up and didn't realize it till I stopped and saw the smoke from the wheels! I saw no increase in tranny temp! Fuel mileage is probably 17 in city and a stable 20 mpg on the hwy running 70-80 mphs. :)
  • honda929honda929 Posts: 10
    I HAVE A 2005 2500HD DURUMAX LB 4X4. WHEN I FIRST BOUGHT THE TRUCK I WAS GETTING AROUND 17MPH. NOW THE BEST I GET IS 13MPH. I KNOW THE 4X4 MAKES IT WORST. I WAS TALKING TO A GUY WITH THE SAME TRUCK WITHOUT 4X4 WHO GETS 17MPG. BUT I HAVE TO SAY ITS GREAT TO GET 13MPG WHEN YOUR TOWING A TOY BOX OUT TO THE DESERT. SINCE ITS NOT AN EVERYDAY DRIVER I DONT REALLY THINK ABOUT THE MILEAGE.
  • honda929honda929 Posts: 10
    DO YOU KNOW ANYTHING ABOUT TIRES ON THE STOCK WHEEL. I HAVE A 2005 2500HD LB 4DOOR 4X4. I HAVE ALLOY WHEELS WITH THE STOCK TIRE. THE STOCK TIRES LOOK REALLY SMALL ON TRUCK. I DONT WANT TO LIFT IT OR PUT BIGGER RIMS ON IT. I WAS WANDERING IF YOU KNOW A GOOD ALL TERRAIN TIRE FOR THE STOCK RIMS. ONE MORE QUESTION OFF THE TIRE SUBJECT. I GO TO THE DESERT A LOT SO MY CABIN FILTER SMELLS LIKE DUST. BUT I CANT FIND WHERE IT IS. DO YOU KNOW WHERE AND HOW TO GET TO THE CABIN FILTER. THANKS.
  • honda929honda929 Posts: 10
    DO YOU KNOW ANYTHING ABOUT TIRES ON THE STOCK WHEEL. I HAVE A 2005 2500HD LB 4DOOR 4X4. I HAVE ALLOY WHEELS WITH THE STOCK TIRE. THE STOCK TIRES LOOK REALLY SMALL ON TRUCK. I DONT WANT TO LIFT IT OR PUT BIGGER RIMS ON IT. I WAS WANDERING IF YOU KNOW A GOOD ALL TERRAIN TIRE FOR THE STOCK RIMS. ONE MORE QUESTION OFF THE TIRE SUBJECT. I GO TO THE DESERT A LOT SO MY CABIN FILTER SMELLS LIKE DUST. BUT I CANT FIND WHERE IT IS. DO YOU KNOW WHERE AND HOW TO GET TO THE CABIN FILTER. THANKS.
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    Hi honda929 and welcome to Edmunds!

    Just as a matter of info, typing in all capital letters on tthe internet is difficult to read and in most circles is considered shouting. When posting, can you turn off your CapsLock? Thanks!

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  • roughneckroughneck Posts: 21
    I recently drove through a dealership and seen a 2004 gmc hd duramax extended cab. it had 285 on it. i looked to see if there was any tire rub on the frame or bumper and didnt see any. but i dont know if anything was done to the torsion bars. it doesn't look like it because it filled the wheelwells out (front and rear) real good. as far as fuel mileage i have been getting about 20-21 doing 70 or so at about 5,000 to 7,000 feet with 45,000 miles on the truck. the real ticket is to get an auxiliary fuel tank in the bed and plumb it into your regular fuel tank. with this i can easily go over 2000 miles before filling up. but i usually take out a small loan when that happens.
  • maxie05maxie05 Posts: 1
    I has a 2005 DURAMAX. I've done everything to it, AIRAID air filter, Edge Juice/Attitude and 4" stainless steel exhaust with a straight through muffler.
    My mileage has dropped, have I gone to far?
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