2019 Canyon All-Terrain X mpg - Chevy Colorado & GMC Canyon
 
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post #1 of 7 (permalink) Old 06-12-2019, 01:40 PM Thread Starter
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2019 Canyon All-Terrain X mpg

Hello :) Got a brand new Canyon 5 weeks ago, it already have 2000miles on it. I'm getting 15-30% worst fuel consumption than my 2017 GMC Canyon. They both have the same LGZ 3.6 and 8 speed trans combo. I can confirm that the fuel consumption is also bad with my 4500lbs trailer behind by arround 2.5-3mpg more on the 2019 than 2017. I can notice also that it seems less powerfull. On the 2017 it was always playing between 5-6-7 mostly in 6th gear (80% of time) on the 2019 it's more in 5th speed than any other gear, almost never goes in 6th speed (not able to keep speed in 6) it even needs to go in 4th speed to be able to accelerate from 60mph to 65mph. All of thoses number are WITH the trailer behind.

The only difference between them is the 2017 is a All Terrain and the 2019 is a All Terrain X who's having side steps and Goodyear Duratrac tires, witch are slightly bigger 265X65X17 vs 255X65X17 on the 2017. Duratrac are 4lbs heavier each.

Any ideas? Both truck are all stock both having the 3.42 axle ratio

Thanks!
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post #2 of 7 (permalink) Old 06-12-2019, 02:22 PM
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Your tires are .5 inch taller and .4 of inch wider and are 4 lbs heavier, which will make mpg worse,
Not sure what type of tires were on the 2017,but the Duratacs are not known for gas mileage, so that might be another negative.

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post #3 of 7 (permalink) Old 06-12-2019, 03:41 PM Thread Starter
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That's what i suspect... but for the performance it's really annoying... Could that be the tires also?
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post #4 of 7 (permalink) Old 06-12-2019, 05:56 PM
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yes, taller wider heavier will effect performance as well as gas mileage. Some of gone to more of a road tire, like Michelin LTX or Geolander AT GO15, quieter, lower rolling resistance

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post #5 of 7 (permalink) Old 06-12-2019, 06:15 PM
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Just out of curiosity, how much did your other tires weigh? A half inch taller and four pounds heavier are causing a 15-30 percent loss in MPG? That kinda sounds like a lot to me for such a small increase. The 265/65/17 is still an OEM size... I wonder if it could be a difference in stock tuning between the two model years?

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post #6 of 7 (permalink) Old 06-13-2019, 08:21 AM Thread Starter
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Dealer says that the truck is still new and it could be related to break in period...

All Terrain Tires (GoodYear Wrangler advanture) 38 lbs
All Terrain X tires (GoodYear Duratrac) 42 lbs

I'm about to install my winter tires from my old canyon and try them :) they weight 35 pounds we will see if it's tire related
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post #7 of 7 (permalink) Old 06-13-2019, 12:40 PM
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Dang... My stock 265/60/18 highway tires are 35lbs. Going to the lightest same size AT is going to be about a 4lbs difference. I wonder if I will experience a similar loss. Guess it's no question if I upsize to the 265/65/18.

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