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Comments
I used to have the bully dog tuner on this truck with no milage improvement but good power but with these mods. This truck is pure mean I recomend everyone make these mods. It cost me about $1,200.00 for the tuner and exhaust. Well worth it especialy when I can out run just about any car or truck on the road.
Our '07 2500 Classic is great but for the mileage... avg. 13 mostly hwy and between 9-11 towing a tiny little 2 horse bumper pull with 2 ponies! Grrr. It's got 55K miles and has been well maintained.
My old '03 Duramax got 21 hwy 17 city... and towing got around 16 pulling a bigger trailer with bigger horses. I was hoping to get the same or better.
When I did the research before I bought this truck, all said the mileage was similar to the '03... now I see these threads and wonder what's going on?
Is anyone out there getting good mileage at all? If so, enlighten us!
Thanks again for all your input and info!!
I'd appreciate any pointers. Thanks.
i drive my truck about an hour each way to work daily, purchased this truck in may of 2011 and was thrilled to see it was getting 18mpg on the drive home! After having the truck a bit i put a soft tonnaue cover on it and immediatly noticed a drop in fuel mileage, to date the truck has been getting around 15.9-16.2 mpg. Wanted to improove mileage so we put cold Air intake system with K&N and did Exhaust with hypertech programmer on stage 2. mileage has not gone up at all since the updates :-(
Any advice would be much appretiated!!!
This week the check engine light came on again so its back to the Chev dealer. This time he says its a glow plug and the EGR/ERG pump and a dirty air filter. The truck went out of warranty in July this year based on years NOT mileage... it now has 45300 on it. During the discussion he told me that the new turbo that they put on about a year ago produces more boost than the factory model AND less fuel mileage. Not happy with that. At first the dealer wanted $1050 to fix my problem but when he was told I would trade it in first he decided to extend my warranty a BIT and cover most of the costs. My NEW cost is about $250. What I didn't tell him is my next attempt to buy a diesel PU would be a Dodge. Sure wish they were quiter.
I will have to say this 06 Chev is rapidly approaching the top of my list of bad vehicles. So far the Chev Vega of 72 fame and the 80 VW Rabbit are on the top of the list with the 99 Ford diesel in 3rd place. This vehicle is catching up fast and could take 3rd place next year.
What to do??? My mileage is about 17---------------grrrrrrrrrrr.
Mine now has 45K on it.
Had it in for a gloplug and a ERG pump... warranty ran out in July but they covered both with a 100 buck payment. At first they wanted $1050 until I complained.
Best,
Sarah
GM Customer Service
I'm sorry to read that after making so many different trips in for this to be looked at there has not been a satisfactory resolution for you. If we can follow up with your dealership on this, please send us an email at socialmedia@gm.com with more information (your name/Edmunds username, phone and address, the last 8 of your VIN and current mileage, the name of your dealership, and number of times you've been in for this same concern). My coworker Christina will advise you further.
Thank you for your patience, and we look forward to hearing from you,
Sarah
GM Customer Service
I see you've checked in with your dealership on this; if you want for us to look into this further with you and your dealer's service department please email us the following information at socialmedia@gm.com: your name and Edmunds username, phone and address, the last 8 digits of your VIN and current mileage, and the name of your involved dealership.
Sarah, GM Customer Service
The first thing is that your Duramax is not broken in yet and probably won't be for another 30K miles. Patience!
The second thing is that it seems to me that speed and MPG are inversely related. The faster you go after a certain point the worse the MPG.
About 6 weeks ago I drove to Winston Salem 150 mile drive and kept the speed on 62 mpg and got 20.2 mpg that was when my 06 Chev just turned 50K. Prior to that time I was getting 17.8 MPG after GM replaced the turbo. The new turbo (probably what you have and much better they told me) actually reduced MPG about 2 and that was back 1.5 years ago. The Chev got in the 20 range when new but not after the new turbo until 6 weeks back.
Some where you can find the power curve graph for OUR engine. See if you can drive where the power HP and Torque are at its maximum for a certain engine speed measured in revolutions per min. That number will be around 1750 RPM's and will be 60 and 65 miles per hour.
Keep driving and it will just get better but don't expect it before the engine is broken in.