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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

506 messages,  Last post on Nov 30, 2009 at 5:21 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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#137 of 506 Re: buying 2006 Duramax [turbo8] by brycar Nov 18, 2005 (7:14 am)
Replying to: turbo8 (Nov 14, 2005 8:03 pm) I would get the one with the 360 hp i thinks it better than teh 310hp Engine, Duramax 6600 Turbo Diesel V8, (300 HP [223.8 kW] 3000 rpm, 520 lb.-ft. [702.0 N-m] 1600 rpm) (LLY) $5,310.00 Engine, Duramax 6600 Turbo Diesel V8, (360 HP [268.0 kW] 3200 rpm, 650 lb.-ft. [881.0 N-m] 1600 rpm) (LBZ)
#138 of 506 Re: buying 2006 Duramax [turbo8] by stoneg Nov 19, 2005 (5:49 pm)
Replying to: turbo8 (Nov 14, 2005 8:03 pm) For what it's worth...I've got the '05 2500hd cc 4x4 310HP and don't pull anything and only get about 12.5 mpg city 15 hwy. As diesel prices are now higher that gas (even 93 octane!), if your not pulling anything or driving considerably high mileage don't bother with a diesel. I keep reading about people getting 20+ mpg, and I frankly just don't see it. I have added/tried EVERY possible aftermarket way (edge, 4" exhaust, intake, acetone, stanadyne, etc.)to improve mpg and some have helped me go from 9mpg city to 12.5, so hope its not to late, and you made the best decision for you. Replies to this message: wjr1027 (Nov 27, 2005 3:30 pm)
#139 of 506 Re: buying 2006 Duramax [stoneg] by wjr1027 Nov 27, 2005 (3:30 pm)
Replying to: stoneg (Nov 19, 2005 5:49 pm) I had been interested in the Duramax since it's conception in 1999. I know when it first came out, they said it would get around 28 miles per gallon. I agree with stoneg, that when they came out diesel was around $110 a gallon. I bought my first in 2001 and was getting 18 miles per gallon. When I bought a 35 fifth wheel trailer, I got around 12 miles per gallon. I purchased my newest one in 2003. I put a straight through muffler on it and pull and drive all the time. I do get 22 miles per gallon on the highway and 17 in town. I do like it and am very impressed with it. I have looked at the new 360 horse Duramaxes and they have the 6 speed Allison transmission which should make the truck get better gas mileage. I know that I will get one soon.
#140 of 506 Door emblems by spademan Dec 01, 2005 (6:34 pm)
Can anybody tell me where to order some better looking door emblems? I've seen them around but can never catch anyone to ask them. They look more flashy than factory. Any info would be great!
#141 of 506 Fuel system issues by cashman11185 Dec 02, 2005 (1:49 pm)
My father has a 2005 silverado with about 15k on it. It is a diesel and its a sweet truck. Recently he had a issue where his check engine light would come on and error code states something wrong with the fuel system. The truck would bog down and have no power. He brought it to the dealer about 6 times and they can't tell him whats wrong. So now he rides with a computer plugged into the jack all the time and when it happens he just resets the truck computer. Does anyone have any ideas what could be wrong. They did replace the fuel filter and things like that but still keeps happening.   Thanks Replies to this message: roughneck (Dec 08, 2005 10:20 am) robp226 (Dec 13, 2005 7:22 am)
#142 of 506 towing ability by tcole Dec 03, 2005 (1:01 pm)
i AM LOOKING FOR THE BEST TOWING VEHICLE OUT THERE AND KNOW THERE ARE AS MANY OPINIONS AS THERE ARE DRIVERS BUT THOUGHT I'D THROW THIS OUT, I WILL BE TOWING A 35 FOOT FLAT BED COMERCIALLY PULLING BETWEEN 10 AND 25 THOUSAND POUNDS. ANYBODY HAVE ANY THOUGHTS ON THIS? TRANNYS? ENGINES? I PROBABLY WILL GO WITH A STICK BUT WAS WONDERING ABOUT THE ALLISON 6 SPEED. THANKS TCOLE. Replies to this message: p100 (Dec 15, 2005 7:39 am)
#143 of 506 Re: Fuel system issues [cashman11185] by roughneck Dec 08, 2005 (10:20 am)
Replying to: cashman11185 (Dec 02, 2005 1:49 pm) I dont know if it is the same problem, but the exact same symptoms. My fuel gelled up on me and the check engine light came on in my 2004 duramax. I was coming home from work and the motor had returned to normal by the time I got home(3 hours) and the check engine light was still on. The dealer plugged it in and the low fuel pressure rail came up. They cleared the code and I was on my way. Runs like a champ again.
#144 of 506 Re: Love my 2003 DM 2500 HD 4x4 Crew Cab [series60] by franks71vw Dec 12, 2005 (10:24 am)
Replying to: series60 (Oct 07, 2005 6:44 pm) Hey I have a 2003 DMAX 4x4 crew cab dually and was wondering if you run veggie oil on yours and if so how it is running and what you did. Any help would be apprecieated.   Frank
#145 of 506 Re: Fuel system issues [cashman11185] by robp226 Dec 13, 2005 (7:22 am)
Replying to: cashman11185 (Dec 02, 2005 1:49 pm) This happened to my company '05 2500 between 20-30,000 miles. Finally found out it was the fuel flow regulator valve or sensor. The Dealer replaced the left side fuel rail and it hasn't happened since. The symptom is just as you described and most techs said it was a clogged fuel filter, but I finally found one that looked deeper into the issue. Rob
#146 of 506 Re: towing ability [tcole] by p100 Dec 15, 2005 (7:39 am)
Replying to: tcole (Dec 03, 2005 1:01 pm) To pull 25k pounds on a regular basis you need a commercial truck, IMO. The new Duramax 360 HP engine in a dually pickup would handle it, but the truck itself is simply not large enough for such large trailer loads. I would not try to go over 15K pounds trailer weight with one of those. My $0.02

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