2008 Chevy Silverado 6.6L Duramax fuel problem
I am only getting 10-12 mpg in my 2008 Chevy Silverado Duramax when other folks
claim their getting 16-17+. What could be wrong? I had a certified tech put the monitor
on it and it checked out with no red flags or bad codes.
Do you have the factory size tires on it? Add a quart of transmission fluid to the fuel tank to clean the injectors. Air filter new?
My driver door says it should have 16 inch tires, but it has 265/17's on it and I'm pretty sure it came with the 17's on it. It's funny you mentioned the air filter. I had the tech check the truck out last night, and through conversation, we pulled the air filter out and it was grey and you couldn't hardly see light through it. I bought a brand new one today, but haven't had enough time to see if it helped.
That is a big part of it. You can also buy a chip for it and set it in safe tow mode and it will increase the mileage and power. Usually 3-7mpg gain. I run superchip in mine.
Also, are you referring to Dexron III transmission fluid? I have heard of adding transmission fluid to the fuel tank, but wasn't sure it would hurt the engine
I pull a 33ft fifth wheel camper with my truck or I will be. I just purchased the truck and figured I would be getting a lot better gas mileage. I have not pulled the camper yet to see what mileage I get with it behind the truck. I sure hope the air filter helps
Yes that is fine. One quart to a full tank of fuel is good for it occasionally.
Ok.....I'll try it and see if it helps. I appreciate your help!!
tans fluid in the fuel tank is not recommended. Have replace many injectors on duramax's for people using "old school" tricks.
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