The Denver 100 Is Born! Will the New 2023 Chevy Colorado & GMC Canyon Beat Their Poor EPA Ratings?

Both truck surprise the heck out of us.

2023 gmc canyon at4 chevy colorado trail boss mpg denver100 mpg loop denver

Can the all-new 2023 Chevy Colorado and the 2023 GMC Canyon beat their poor EPA MPG ratings? The GMC Canyon has a high-output version of the 2.7L turbocharged I4 engine, and the Chevy Colorado does not. Mr.Truck and I take them on our new Denver 100 loop to find out.

We have been doing real-world pickup truck efficiency testing for around 10 years, but we now have a new MPG loop we call “Denver 100”. It’s a large highway loop around Denver, Colorado that also includes a bit of city driving.

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The new 2023 Chevy Colorado can be had with three versions of the 2.7L Turbo: base, Turbo Plus, and High Output. This Colorado Trail Boss has the middle “Turbo Plus” version. It is rated at 310 horsepower and 390 lb-ft of torque. It’s EPA-rated at 18 MPG combined due to aggressive 32-inch Goodyear Wrangler Territory MT “mud terrain” tires.

The new 2023 GMC Canyon can only be had with a high-output version that is rated at 310 horsepower and 430 lb-ft of torque. It’s rated at 19 MPG combined with smaller diameter 31-inch Territory AT “all-terrain” tires.

2023 chevy colorado gmc canyon epa mpg rating 4x4 mud terrain tires

We drive both trucks on the same loop at the same and at the same time. The results really surprise the heck out of us!

Spoiler Alert: this Colorado Trail Boss registers 22 MPG, and the GMC Canyon AT4 shows 22.7 MPG at the pump. Whoa! This is a far better result than the EPA ratings suggest. It’s also better than we expected.

Join us in this fun video below.