2015 Chevy Silverado 1500 6.2L: Highway Towing MPG (Part 2) [Video]

2015 chevy silverado v8 towing a horse trailer highway mpg test review
2015 Chevy Silverado

How does towing a 9,500 pound horse trailer affect the highway fuel economy of the 2015 Chevy Silverado 1500 with the 6.2L V8 and the 8-speed automatic transmission? TFLtruck wanted to find out.

We ran this Silverado LTZ without the trailer in (Part 1) of this test. Now, it was time hook up the trailer and repeat the same route on the same day to see the difference. The 9,500 lbs trailer is well within the capability of this Chevy as it has the Maximum Trailering package. The towing capacity on the truck is 11,900 lbs and maximum payload is rated at 2,110 lbs.

TFLtruck listened to the feedback that you provided us after previous tests, and we changed the route to 98 miles (from 43.6 miles). We also increased the speed from 65 to 75 MPH. This speed is legal on the I-76 interstate in Colorado. It’s also the speed limit in many other states.

The longer route should help decrease the margin of error during fill-ups. This run consists of a loop from Hudson, CO to Fort Morgan, CO and back. We are running in both directions in an attempt to eliminate the affects of the wind.

We get on the highway, set the cruise control at 75 MPH and let it run. We do use the automatic A/C system with the interior temperature set at 71F. The ambient temperature was 70F with a fairly strong wind from the north.

We are using a “double-click” method to filling up. Let the pump click, wait 30 seconds, and let the pump click again. This allows the fuel to settle down before it’s topped off.

When the calculations were complete, this 2015 Silverado Double Cab 4×4 returned a highway MPG of 19.01 MPG.

Stay tuned for Part 2 of this test, where we hook up a 9,500 lbs horse trailer to the back of the truck and repeat the same run. We wanted to find out how a large and heavy trailer affect fuel economy when running at the same highway speed.

Check out the TFLtruck mpg test video for all the details of the test.

2015 Chevy Silverado 1500 – Highway MPG

 Empty With Trailer
Test Load (trailer + ppl) 500 lbs 10,000 lbs
 Ambient Temp F 70F 70F
Route (mi) 98 98
Elevation Avg (feet) 4,650 4,650
Highway MPG  19.01  7.55

Check out all the details in this TFLtruck mpg test video.

Andre Smirnov
Andre Smirnov

Andre Smirnov is a life-long automotive enthusiast, writer, reporter, and software engineer. He has been a contributor at TFL since 2011.