Wow, I've followed the Ecodiesel and haven't been able to make the leap yet, they of course really poo-pooed the canyon's mileage but I think that's very acceptable,
I even checked it at fuelly
http://www.fuelly.com/car/gmc/canyon?engineconfig_id=229&bodytype_id=&submodel_id=
Have you had any mechanical or other issues with it? Do you have a forum/support page that you belong to?
Hey man, I've had it for 6mo, haven't had any issues at all. My MPG is never been as low as the average on that fuelly page, some of those strike me as near 100% city MPG, I don't think I could hot-rod the thing enough to get low 20's, lol. The MPG does drop temporarily during DPF regeneration, dropping into the low 20's for like 30 minutes while it's running super-rich to clear the DPF.
So far I love it, as does my wife as she can drive it and be much less intimidated in town as compared to driving a full-sized. I guess it all depends on expectations. I've had just about every kind of truck under the sun, up to a Dodge 3500 Dually 4x4 with Cummins, but right now I don't NEED to tow anything that big, nor need the space since we're empty-nesters at this point. Like I said, given the lack of discounting I could have gotten a pretty loaded Sierra for the same price, but we drove both at same time, went and had lunch, and decided which did we LIKE the best, price be damned, and we both liked the Canyon.
It's somewhat interesting to drive thing thing. In normal mode, it drives pretty much like a normal truck, but sounds more truck-ish than the gasser. Put it into tow/haul mode, hook the boat up, and it's personality totally changes. It then takes on the personal of a mini-HD diesel pickup, it's almost funny the way it does it. Diesel exhaust brake is active, so when you slow down it gears down big time. It does NOT tow like my Cummins or big Duramax trucks did, but honestly tows at least as good as the Tundra 5.7 did, which honestly is pretty damn amazing given its size, and it's tow rating.
Anyway, like I said, it's about expectations and needs. I want to put a lift and bigger wheels on it, and it will still fit in the garage, lol. I'm past the point in life I have to have the biggest truck to impress others. I'm on the coloradofans.com site to research a bit, but not sure I've even posted. I don't get near as active in the forums as I used to be.
Here's a pic of the 25-mile average MPG during a recent trip through the hill-country, my day to day drops to around 30. Also a pic of the truck and the Sea-Ray I traded.