Should have mentioned that this 6-speed transmission was to be available on the 1500.

 

QUOTE: "It will only be available with a 3.42 rear axle, prioritizing fuel economy over towing prowess. Four-wheel-drive, crew cab Silverados with the 5.3-liter V-8 and new six-speed automatic are rated at 14/20 mpg city/highway. "

so it will come with a crappy gear ratio

 

gettin around 16+ for me...highway im over 20...long hauls ive seen 24...but thats the best so far...and mostly down hill out of the mountains lol...

trevor

 

Ive got a 2001 Silverado on 35 inch tires with 4:56 gears, headers, intake, and exhaust with a programmer. I drive semi aggressively and I average about 10.5 mpg mixed

 

Hi guys!
I'm thinking of restricting my 89 Blazer for around the farm use and get a new 2500 HD ext cab with the Duramax diesel.
Can anynone tell me honest figures on what to expect mileage wise?