Upgrade our 2011 Armada to a 2014 Silverado 2500 HD with the 6.0L V-8. What can I expect for gas mileage when towing about 9,000 lbs.

I get 7-9 mpg towing less with that same pickup. I don't tow over 65 mph either. Nice little thirsty engine.

In my experience, no matter what gas motor you pull with, towing most enclosed trailer return a common range of 8-11mpg regardless of weight. Its driving speed and techniques that really makes the difference. Why do I say that? - With my current TT, a small V6 got the very same MPG as my current big V8. - Pulling an empty 6x14 cargo trailer I get the very same MPG range. - Towing the same 6x14 cargo trailer with my Dads Flex Ecoboost, is within the very same range. In every case, 10-11 (even 12 on slower 2 lane highways) is easy if we slow down and limit passing.

Whatever you got with the Armada towing should be the same. I get 8-10mpg with my 6.0L/6-spd/3.73 depending on speed and wind. I have never seen a gas engine tow a high walled RV get 12mpg. Budget for 8mpg and be happy with 9-10. I budget for 8mpg and can get that at 65-70mph towing. I get 10mpg closer to 60mph.

I do believe you will get between 8 and 10 mpg. We tow a Jayco HT 26.5 RLS and a 19 Crestliner with our 2012 D/A crew cab GMC 2500HD and get, generally close to 12 on the highway. We took the FW only on a 3,500 mile trip last spring to Idaho, Nevada, Yosemite and Sequoia National Parks, Palm Desert, Zion and Salt Lake City and then home and got 12 mpg over the whole trip. But diesels will get better mileage pulling the same loads and that's why I say between 8 and 10. Our old 454 Vortec would get 8 mpg and our old diesel pulling the same loads would get around 12, approximately 50% greater mpg.

2014 Silverado 2500HD MPG | Good Sam Community

hawkeye-08
Explorer III
Jun 08, 2015
With our 2011 GMC Sierra CCSB 4WD 6.0/6sp/3.73 pulling our ~8000lb trailer, we get 7.5 to 8.5mpg. If you get the 4.10 gears, you should get a bit better (I know it is counter intuitive, but an extra 200rpms allows it to use a higher trans gear (5th instead of 4th) which reduces rpms and results in better mpgs. The 4.10s won't hurt you at freeway speeds on mileage because you have plenty of transmission gears to run 80mph if you want...
Ryan_Elli1
Explorer
Jun 08, 2015
Before I got my F250 I had a HD 6.0 and pulling my FW from El Paso, TX to MI then to NC I got 9 MPG. The trucked fine even though the little mountains. I did get better MPG with the heavier FW than I did with my 7000lbs TT. With the TT I got 8.
Elbert
Explorer
Jun 07, 2015
7-9 is a good number... maybe a little better on flat ground
GeoBoy
Explorer
Jun 02, 2015
I have a 2005 Silverado 6.0 with a 4 speed, 4.10 gears, drive 60-62 mph and pull a 8'6 wide, 10'6" high, 7,000 lbs. TT and get 11 mpg. My truck gets it best mileage with 89 octane gasoline. Great motor!
ksss
Explorer
Jun 02, 2015
A couple weeks ago I took 17K up a 6 mile 6% grade (2015 3500 6.0), crested the hill at 40 mph, the dic said I was getting 4 mpg, elevation was about 6500 at the top of the grade. Overall on the 150 mile trip I averaged 8 mpg with that load. My LBZ would have gotten 9-10. The tranny heated to 210, ambient temp was about 65 degrees. As a side note, I had just gone through a DOT inspection at the bottom of hill, there was no running start.
nomad297
Explorer
Jun 01, 2015
Dakota98 wrote:
nomad297 wrote:
10-12 mpg

Bruce

Bruce only travels with the wind at his back. :B

Makes for interesting routes.

I had one trip from home in Virginia to Lake George in upstate New York where I got 13 mpg in my 2004 Silverado 2500HD. On the way home I got 10 mpg.

Bruce
rangerbait
Explorer
Jun 01, 2015
mooky stinks wrote:
APT wrote:
Whatever you got with the Armada towing should be the same. I get 8-10mpg with my 6.0L/6-spd/3.73 depending on speed and wind. I have never seen a gas engine tow a high walled RV get 12mpg. Budget for 8mpg and be happy with 9-10. I budget for 8mpg and can get that at 65-70mph towing. I get 10mpg closer to 60mph.

^^^^^^THIS^^^^^^^

^^^^^^THIS AGIAN^^^^^^

I towed this combo about 4,500 miles across the country last spring (2011 Armada 5.6L/7,000lb 27' TT) and averaged about 8mpg.

I towed this combo about 3,500 miles across the country in the winter of 2011 (2004 Titan, 5.6L/same 7,000lb 27' TT) and averaged about 8mpg.
Dakota98
Explorer
Jun 01, 2015
nomad297 wrote:
10-12 mpg

Bruce

Bruce only travels with the wind at his back. :B

Makes for interesting routes.
mooky_stinks
Explorer
Jun 01, 2015
APT wrote:
Whatever you got with the Armada towing should be the same. I get 8-10mpg with my 6.0L/6-spd/3.73 depending on speed and wind. I have never seen a gas engine tow a high walled RV get 12mpg. Budget for 8mpg and be happy with 9-10. I budget for 8mpg and can get that at 65-70mph towing. I get 10mpg closer to 60mph.

^^^^^^THIS^^^^^^^
ib516
Explorer II
Jun 01, 2015
TomG2 wrote:
I get 7-9 mpg towing less with that same pickup. I don't tow over 65 mph either. Nice little thirsty engine.

I agree with 7-9 mpg.