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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

621 messages,  Last post on May 30, 2013 at 3:47 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 2500HD, Chevrolet Silverado 3500, GMC Sierra 2500HD, GMC Sierra 3500, Diesel, Fuel Efficiency (MPG), Truck

Messages Page 4 of 63

#28 of 621 2001 D-MAX Mileage by spademan

Mar 26, 2005 (9:44 pm)

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??

#29 of 621 Can I just say... by rtinaz

Apr 02, 2005 (11:48 pm)

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!

#30 of 621 Re: [2manytoys] by luke6

Apr 05, 2005 (9:29 pm)

Replying to: 2manytoys (Nov 21, 2004 8:50 am)
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.

#32 of 621 Re: DURAMAX FUEL MILEAGE [blackmax] by larrydi

Apr 29, 2005 (8:27 am)

Replying to: blackmax (Sep 19, 2004 2:26 pm)
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.

#33 of 621 D/A mileage by the_vfox

Apr 30, 2005 (6:33 pm)

At 23k miles, I get 17-20 unloaded, 10 - 14 towing the 5th Wheel, depending on terrain headwind etc.
 
 
 
2004 Duramax Silverado Crew Cab

#34 of 621 2005 Duramax Fuel Mileage by gemini5362

May 09, 2005 (6:29 pm)

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.

#35 of 621 Re: Diesel truck advice for girls! [justatrucker] by laser2

May 31, 2005 (7:04 pm)

Replying to: justatrucker (Mar 04, 2005 3:42 pm)
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...??

#36 of 621 Duramax mileage and service by chvylvr

Jun 01, 2005 (5:54 pm)

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.

#37 of 621 Re: DURAMAX FUEL MILEAGE [blackmax] by honda929

Jun 02, 2005 (8:44 am)

Replying to: blackmax (Sep 19, 2004 2:26 pm)
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.

Messages Page 4 of 63

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