You are here: Forums Pickups Diesels Chevy Silverado and GMC Sierra Duramax Fuel Mileage

Chevy Silverado and GMC Sierra Duramax Fuel Mileage

506 messages,  Last post on Nov 30, 2009 at 5:21 PM

You are in the Diesels Forum. Your Host is kcram

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

Messages Page 41 of 52 1 ... 38 39 40 41 42 43 44 ... 52 Prev Next Last

Go To Msg # Search This Discussion

#395 of 506 Re: Horrid mpg '07 Duramax--HELP! [ipokebadgers] by captbilly Jun 26, 2008 (4:15 am)
Replying to: ipokebadgers (Jun 08, 2008 1:28 pm) I have an '06 crew cab with the Duramax. I have 315 70 R17 tires and a 3 inch body lift. I get 15.4 mpg on country roads at about 55mph. I think that the lift and larger tires are what is killing the mpg. I've heard that better mpg can be attained through air filters, larger exhaust, and with the superchip computers. I haven't tried any yet but am considering it.   Good luck
#396 of 506 Re: Horrid mpg '07 Duramax--HELP! [ipokebadgers] by tcsaner Jun 26, 2008 (1:35 pm)
Replying to: ipokebadgers (Jun 08, 2008 1:28 pm) Get hold of your local Lubrication Engineers rep to purchase BTU+ Diesel Fuel Improver. You'll get upwards of 20% fuel efficiency increase. Go to le-inc.com for more information. This stuff really works.
#397 of 506 Re: 08 duramax mpg [jtoc] by andyc8401 Jun 26, 2008 (4:35 pm)
Replying to: jtoc (Jun 08, 2008 4:23 pm) i have 2008 duramax the mileage is terrible 6 pulling 8000lbs you need to find a used one the new ones dump raw into the exhaust to burn out a filter they suck fuel and fill the cab with ex. smoke gmtold told me this normal live with it they wont even look at
#398 of 506 2008 duramax mileage by andyc8401 Jun 26, 2008 (4:43 pm)
i have a 2008 duramax the mileage is terrible about 6 towing 8000lb, this thing pours raw fuel into the exhaust "to clean the exhaust filter" when it doaes this it fills the cab with smoke. i contacted gm they said this NORMAL and i should learn to live with it the y wont even look at the truck Replies to this message: alaskadually (Jul 13, 2008 4:34 pm) losman54 (Jul 13, 2008 5:08 pm)
#400 of 506 2002 duramax vs 2008 duramax by losman54 Jun 29, 2008 (7:52 pm)
I have a 2002 duramax, I have it beefed up with Banks six gun tuner, K & N filter, Banks’ monster exhaust and I threw in an exhaust brake because I pull a horse 4 horse slant and 14-15K 5th wheel. Ariund town I get 17.5-18 MPG and last time I pulled my 5th wheel form Fl to NJ ...I got approx 11 MPG. I can live with that since my old Monaco motor home got about the same whe I towed my 2002 Silverado behind it on all 4 wheels. PS I have about 125K on it and it runs like a top!   I'm about to get a new 2008-09 dully but I'm concern about the mileage that those of you who have the 08's are getting. Are the differences between these two engines that different? Or should I stay with the truck I have? I thought the MPG on the F450 sucked, what the heck is GM doing here. Have they ruined the best truck on the market? Replies to this message: alaskadually (Jul 13, 2008 4:43 pm)
#401 of 506 Re: Horrid mpg '07 Duramax--HELP! [ipokebadgers] by losman54 Jun 29, 2008 (8:05 pm)
Replying to: ipokebadgers (Jun 08, 2008 1:28 pm) I have had very good luck with K&N filters. I waited unitl my 2002 reached 100K before I did anything to the engine with Banks stuff, but you can improve mileage by making the truck run cooler. The Filter will help, you can change the exhaust ...change the pipe dimension form 3 to 4", and you can even change the radiator all without avoiding the warranty (but check...just don't take my word for it). Try the air filter first and see how that helps.
#402 of 506 Injectors by whats Jul 07, 2008 (7:42 am)
Can anyone confirm a bulletin on the injectors for a 2003 GMC Duramax being replaced on warranty?   David Watts Replies to this message: kao1986 (Jul 07, 2008 8:17 am) madbrit427 (Jul 08, 2008 12:34 am)
#403 of 506 Re: Injectors [whats] by kao1986 Jul 07, 2008 (8:17 am)
Replying to: whats (Jul 07, 2008 7:42 am) Yes the injectors are warrantied to 200,000 I believe. I had mine replaced last fall. Replies to this message: madbrit427 (Jul 08, 2008 12:34 am)
#404 of 506 Re: Injectors [kao1986] by madbrit427 Jul 08, 2008 (12:34 am)
Replying to: kao1986 (Jul 07, 2008 8:17 am) What is the problem with the injectors? Just old age?   Sometimes my 2004 LLY emits little puffs of smoke under acceleration and sometimes idles rough when pulled up in traffic. Injectors?

Messages Page 41 of 52 1 ... 38 39 40 41 42 43 44 ... 52 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums Pickups Diesels Chevy Silverado and GMC Sierra Duramax Fuel Mileage