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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

424 messages,  Last post on Aug 10, 2008 at 6:37 PM

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

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#44 of 424 Love the D-Max by mnichols Jun 17, 2005 (7:02 pm)
Just purchased a 2005 Silverado 2500hd with the D-max. I traded in my Dodge 1500 with 4.7 v-8. The Dodge would "cry" every time I hooked up my travel trailer to it, but the chevy barely notices.... like a fly hitting the windshield of a mack truck, it just doesn't matter. I've been wanting to go diesel but the price kept me at bay until gm came out with the employee price incentive. With the that and a $3000 rebate, it turned a $43000 truck into a $33000 truck, I couldn't resist. It looks like i'm getting 17 mpg mixed highway and city with 2/3 of the miles coming from highway. I looked around and ford and dodge wouldn't match the price, only thing they could do was tell me how horrible gm was. Anyway, I got the W/T package and the factory had upgraded the seats to the cloth and put power windows and mirrors along with a few other touches.... I'm very happy with the d-max and would strongly recommend anyone interested in a diesel to buy now. Replies to this message: gemini5362 (Jul 11, 2005 6:28 pm)
#45 of 424 Re: 2005 Duramax Fuel Mileage [gemini5362] by aarongd Jun 28, 2005 (3:53 pm)
Replying to: gemini5362 (May 09, 2005 6:29 pm) i also have a 2005 HD2500 4x4 with the duramax. i was told that it would get better as i also asked at 1000 mi. i now have 11,000 and still getting terrible mileage. i get around 13-15 city and highway. i also have 3.73 gears. not to happy about spending the extra $8,000 for the diesel for the economy when i could of got the 8.0 litre for substantially less with about the same mileage. let me know if you find a solution. by the way, i tried a K&N filter,it was a waste of money.
#46 of 424 Re: DURAMAX FUEL MILEAGE [blackmax] by aarongd Jun 28, 2005 (3:55 pm)
Replying to: blackmax (Sep 19, 2004 2:26 pm) read my posting #45
#47 of 424 Re: DURAMAX FUEL MILEAGE [larrydi] by aarongd Jun 28, 2005 (4:01 pm)
Replying to: larrydi (Apr 29, 2005 8:27 am) read my posting # 45
#48 of 424 High Pitched Whine by 05duramax Jun 28, 2005 (7:38 pm)
Just had my 05 2500HD Duramax for a week. Overall really like all the features and realize diesels are noisy, however there is an extremely high pitched whine it makes when you let off the accelerator at cruising speeds. Doesn't last long, but is really irritating. Anyone experiencing the same noise? Am getting about 18 mpg so far and pretty pleased with that. Replies to this message: aarongd (Jun 29, 2005 12:39 pm) 05duramax (Jul 01, 2005 2:35 pm)
#49 of 424 Re: High Pitched Whine [05duramax] by aarongd Jun 29, 2005 (12:39 pm)
Replying to: 05duramax (Jun 28, 2005 7:38 pm) i have the same thing on mine. originally i thought it was an issue,but i believe it ended up being the turbo winding down. normal operation.and yes, if you never had a diesel before, they take a little getting used to. you will notice other little things here and there that you aren't accustomed to. your lucky your getting 18mph. i am getting between 13-15 65 mph. Replies to this message: 05duramax (Jul 01, 2005 2:35 pm)
#50 of 424 Re: High Pitched Whine [aarongd] by 05duramax Jul 01, 2005 (2:35 pm)
Replying to: aarongd (Jun 29, 2005 12:39 pm) Thanks for letting me know it's just a normal characteristic of this engine. My driving is probably more at 55-60 so that's a definite factor. Overall I really like this truck and will like it even better when I get it equipped with a tool box and some other accessories. You're right about diesels just having some quirky characteristics. I hope at resale time it's worth the extra money I paid to get it.
#51 of 424 by Sylvia STAFF Jul 05, 2005 (1:21 pm)
A reporter would like to interview diesel passenger car and pick-up owners and Southern California residents who'd like to buy a diesel passenger car but can't because new ones aren't sold in California. Please respond to jfallonedmunds.com by Thursday, July 14, 2005 with your daytime contact info, vehicle year/make/model and city/state of residence, and put the word “diesel” in the subject line.
#52 of 424 Re: 2005 Duramax Fuel Mileage [gemini5362] by unklal Jul 08, 2005 (6:36 am)
Replying to: gemini5362 (May 09, 2005 6:29 pm) Just joined the forum, and I am getting exacly the same miles. Get about 10-12 pulling a 6200lb camper and right now back and forth to work is averaging about 17-18MPG. I was also told that after the engine broke in that it would do better for mileage. Had I know the mileage was going to be like this, probably would have purchased a gas engine for a chepaer price and cheaper price at the pump.
#53 of 424 Re: Love the D-Max [mnichols] by gemini5362 Jul 11, 2005 (6:28 pm)
Replying to: mnichols (Jun 17, 2005 7:02 pm) Now that I have almost 3500 miles on my truck I am seeing between 16 and 17 but that is running at 75 to 80 miles an hour unloaded. I am very happy with my duramax the truck is fun to drive. I do have one other question about the truck. at 80+ miles per hour when driveing on a toll road in Oklahoma the truck seems to be very bouncy almost like the concrete divider sections of the road hit a resonant frequency for the springs. My brother in law who has an older duramax said his road badly till he went to a bigger tire (285x 16) mine rides fine on regular state paved highways it is just on the toll road I seem to notice this. At 75 mph (which I know is the speed limit the truck just likes to go faster than that) the vibration dies away to where it is almost not noticeable has anyone else had this problem.

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