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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

505 messages,  Last post on Nov 28, 2009 at 11:02 AM

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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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#95 of 505 '06 DMAX by clongwell Sep 29, 2005 (8:02 am)
Under the current GM pricing I could not find anyone that would sell a DMAX with the LBZ engine. I couldn't give up the 9 or 10k off MSRP for an engine upgrade. Has anyone had experience with the 6 speed Allision Auto? Replies to this message: ruskand (Sep 30, 2005 6:59 am) poodles (Oct 21, 2005 1:06 pm) 2fastdre (Oct 21, 2005 3:13 pm)
#96 of 505 Re: Love my 2003 DM 2500 HD 4x4 Crew Cab [stoneg] by aarongd Sep 29, 2005 (6:07 pm)
Replying to: stoneg (Aug 27, 2005 8:03 pm) i have read that replacing with the stock shocks with the blistien shocks is suppose to make it better. i personally have not done it. as far as fuel economy goes,it did'nt seem to make any difference before or after the lift . i have 265/75/16 tires.i get just about the exact same milage you are stating. i don't know how they are getting the milage they say they are. i've tried driving a constant 60 m.p.h and i might get an extra .5-1.0 mpg more. .one thing that i did try and is pretty inexpensive and seems to work the best is using acetone in my fuel. approx 2 ozs per 10 gallons of fuel. it seemed to bring it up around 2 m.p.g. go to yahoo search and type in acetone diesel. click the first item. big article on using acetone. try it and let me know what you think? Aarongd Replies to this message: stoneg (Oct 02, 2005 5:48 pm) stoneg (Oct 07, 2005 6:25 am) series60 (Oct 07, 2005 6:44 pm) stoneg (Oct 10, 2005 7:57 am) franks71vw (Dec 12, 2005 10:24 am)
#97 of 505 Re: HELP! New Diesel Owner on MPG [benr] by sleadhead44 Sep 30, 2005 (5:29 am)
Replying to: benr (Sep 14, 2005 3:37 am) Benr, Yes, I have the 5 spd. Allison Auto Trans, and I always use the tow button. I will have to try it without the tow button on to see what MPG I get. I guess I was just afraid of burning up the tranny if I didn't use it. I use cruise control alot and try not to stomp the gas pedal, I try to keep that to my race car.
#98 of 505 Re: '06 DMAX [clongwell] by ruskand Sep 30, 2005 (6:59 am)
Replying to: clongwell (Sep 29, 2005 8:02 am) The new DMAX with the LBZ engine will start hitting the production lines next week and should start hitting the streets soon after. I just bought a 2006 with the LLY motor that has a lot of the upgrades of the new LBZ motor and it made a huge difference over my 2004. The mileage appears to have increased 3-4 mpg with the modified LLY. With the increased fuel pressures of the LBZ, this may not happen since usually more HP/Torque usually means more fuel (but who knows). Chevy wouldn't even tell me what to expect with the modified LLY. The 6 speed seems great, shifts smoother than my 2004 did and definitely likes to go fast. I would suggest buying now and saving $10,000 and see what happens with the newer engine. Also, I hear that Bully Dog is already designing new performance parts and looking for testing people on their website. Replies to this message: poodles (Oct 21, 2005 1:06 pm) 2fastdre (Oct 21, 2005 3:13 pm)
#99 of 505 Great Truck by monteboy1 Sep 30, 2005 (9:44 am)
I have a 2002 2500 HD ext. cab and was wondering what common fuel mileage is? I have had an all time best at 25.4.miles to the gallon on the highway. I love the quietness of the Duramax too. Towing I have had an all time best of 17 MPG with a 6,000 pound enclosed snowmobile trailer. Just wondering how many more trucks are like this? Replies to this message: stoneg (Oct 02, 2005 5:55 pm) series60 (Oct 02, 2005 7:26 pm)
#100 of 505 Love my DM 2500HD 4x4 Crew Cab....Hate my MPG! by stoneg Oct 02, 2005 (5:48 pm)
Replying to: aarongd (Sep 29, 2005 6:07 pm) As for the ride...night and day. However, my mpg are at 10.5 today...I'll be hunting up some acetone tomorrow. About 5 ounces for a 26 gallon tank? I just ordered the Edge Juice with Attitude (will be using level 1 for better mpg's, but level 3 or 4 to embarrass these kids with "tuners?" from time to time) and it will be here in about 2 weeks, and will report on its efects.
#101 of 505 Re: Great Truck [monteboy1] by stoneg Oct 02, 2005 (5:55 pm)
Replying to: monteboy1 (Sep 30, 2005 9:44 am) WOW, you must only drive WITH the wind. I couldn't get 25 mpg if I was chained to the back of an 18 wheeler!!! Some of us are getting 10 city, and 14-15 Hwy. Damn your lucky.
#102 of 505 Edge Attitude Monitor Mount by stoneg Oct 02, 2005 (6:01 pm)
Has anyone found a way, other than the piller, to mount the Edge Attitude Monitor on a 2005 GMC? My friend has an 02 and found a billit console cover mount for it on Ebay, but the overhead console in his truck had a larger opening in it than mine. I saw another overhead mount on Ebay for about $45 + $15 shipping, that says it fits all makes, but want to know if anyone has tried it or other products. I dont like the piller mount, and prefer not to drill holes on the dash to mount it. Replies to this message: stoneg (Oct 07, 2005 6:14 am)
#103 of 505 DURAMAX THROTTLE RESPONSE by series60 Oct 02, 2005 (7:15 pm)
I have a question for all ya's, I own a '05 silverado with a duramax. The problem that I am experiencing is that from time to time especially when I am in the throttle passing someone the engine would die down and won't go over 2000 rpm. I acts like when the fuel would start to gel in the winter. Then I would have to get totally out of the throttle and wait a couple of seconds and then usually it would go back to normal but not all the time. I put a scanner on it and the are no DTC's in the ecm. Did anyone have this problem before? I am thinking that it might be emission related but not sure. If anyone has any input please let me know. THANKS!! Replies to this message: aarongd (Oct 27, 2005 12:30 pm) aarongd (Oct 31, 2005 3:26 pm)
#104 of 505 Re: Great Truck [monteboy1] by series60 Oct 02, 2005 (7:26 pm)
Replying to: monteboy1 (Sep 30, 2005 9:44 am) Your lucky!!! my '05 is lucky to see 15.6 highway and I rarely get in the throttle.

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