Re: Fuel Milage on GMC Trucks?
 

I have an 04 Chevy Dually Crew Cab with the 8.1. only have 400 miles on it, but I get 10 wether towing or not is seems. I only tow a 24 ft Checkmate and have not had it on the highway yet, only around town. The 8.1 is the best gasser I have ever had, Incredible torque! I wanted a white Crew cab, and my dealer said a white crew cab deisel was impossible to get. I did not but a dually with a big block for good gas mileage though. Most solid truck I have ever had, traded an 01 GMC HD 2500 in on it with the 6.0 and while i had the 6.0, I was very impressed with it performance, but now that I have the 8.1 w/ Allison, I will never go back. The 6.0 got 12-13 mpg empty and 11 towing.

Re: Fuel Milage on GMC Trucks?
 

I've got a 2000 3/4 ton suburban with 6.0 engine and 4.10 rear.
Best non-towing was 12-13 mpg
Towing my Formula 303= <8mpg.
You never said what you're towing?
If it's over 6000 lbs. go for the diesel, if under I would just get a 1/2 ton with the 5.3 engine. I heard they get around 20-22 mpg highway. That was from a friend with his tahoe 5.3
Bottom line is for heavy towing, the duramax/alison combo works the best.
And diesel is about .35 cheaper than gas now.

Re: Fuel Milage on GMC Trucks?
 

03 gmc dually diesal allison auto tow 40 hustler on steel trailer from FL to TX averaged 13mpg, empty can run 18-20mpg depends on my foot. 1993 chevy extended cab dually 454 auto with overdrive 6mpg not loaded or not from FL to TX go diesel if all possible, there are lots of rebates and dont be afraid to look in TX thats where I bought mine when I lived in FL and saved a few grand more.

Re: Fuel Milage on GMC Trucks?
 

Duramax with Allison is definitely the way to go, no doubt worth every penny in the long run. Buy it right now, GM is giving them away through August 2nd to make room for the 2005 models. Look at GM website for regional promo's like the $4k Loyalty Bonus, $1k off on Dura/Ally combo, $1k +/- on Power Pack options, Low Financing, etc. And don't pay a dime over invoice, work them down from invoice, they're picking up nearly $2k on the holdback. And if you have a GM Credit Card Rebate, you could easily take $10k off the sticker before working on trade or down payment figure.

21MPG highway and 16 city is not uncommon with a light foot, and diesel fuel is running about $1.70 or less. Check out http://dieselplace.com/forum/ which is kind of like an "OSO" for Duramax owners.

Not sure why you would not want a diesel, the Duramax LLY is simply incredible and perfect for what you want a truck for. Don't rule it out, test drive a 2500HD or 3500 Silverado, you'll be hooked in the first couple miles.

Re: Fuel Milage on GMC Trucks?
 

Keith , Are you a Salesman? Hell, i work at a GMC dealership and I'd probably buy a truck from you instead.

Re: Fuel Milage on GMC Trucks?
 

LOL!!! As a matter of fact, yes. :D Maybe you can help me with the Silverado "under-back-seat storage box" option GM parts has on their website? $368 is about twice the value, should be more like $170. hahaha Don't make me to run over to Walmart and buy some storage bins and do it myself, that would look cheesy!!!

Re: Fuel Milage on GMC Trucks?
 

keith. let me check on that. I'll get back to you. :cool:

Re: Fuel Milage on GMC Trucks?
 

I have a 04 6.0 crew cab 2500hd with 4.10 gears. I get a hair over 14 everyday normal dirving. Between 10 and 12 when towing depending on how fast I tow.

Re: Fuel Milage on GMC Trucks?
 

What website are you on?

Re: Fuel Milage on GMC Trucks?
 

Keith , what year/style truck do you have? I'll ck on that for ya!! :)