Fantastic build !!! Keep up the great work !
It is a pretty sad state of affairs that they won't make the frame (which is the very foundation of a truck) strong enough to even do light duty truck things. It's pathetic actually.
I think that the ZR2 we have on order only has a weight rating of 1170 lbs. 4 big guys and it's at capacity with nothing in the bed. Laughable.
On a side note: I read and researched the pic online of the new generation Colorado ZR2 that finished and won with the bed at an obscene angle. It instantly looks like the frame bent but the article also said that the bed mounts are what failed, not the frame. But I have also seen 2nd generation Colorado's that have bent the frame.
So either way I would be extremely cautious and careful when driving wash board roads. If we were going to put a slide in, on the truck, I think that I would seriously consider strengthening the frame. Warranty will be voided anyways if you do what the manual tells you not to do. But you can have great peace of mind by strengthening it.
The frame-bending issues, at least with the Colorado/Canyon, have been due to extremely hard hits while carrying or towing a load off-road. Sometimes it happens because someone isn't using common-sense and just sends it, other times it's just someone being caught out by a sudden whoop/dip. I've seen it happen both ways. The frames are absolutely strong enough to handle truck things, my truck has handled quite a bit (including an unexpected, large dip while towing a boat that I thought for sure bent my frame and I was afraid to look) and hasn't suffered any frame issue.
However, since buying our off-road trailer and planning on doing some long-distance overlanding I wanted to be proactive. So, to help in this area I had these installed -
https://www.badlandindustries.com/product-page/2015-20-colorado-canyon-frame-stiffener-brace-plate - to stiffen up the area around the oval. Apparently that is there as part of the crumple zones and is intended to bend in the event of a rear-end collision but is also bending when subjected to hard vertical hits that bottom out the suspension.
Regarding the ZR2, the lower payload is a compromise resulting from having the ZR2's suspension. This is nothing new for any off-road focused truck, heck I can remember specing out some 1/2-ton trucks that ended up with less than 1,000LB of payload capacity and Gladiator Rubicon's with the EcoDiesel with barely over 1,000LB of payload (less as you add options, of course). 1,170LB payload isn't peanuts for a 1/4-ton truck. It's not the best, but it's not the worst either.
That 3rd gen with the tweaked frame was the result of a hard, incorrect landing towards the end of the race. 100% wasn't the bed mounts, it was the frame. The rear hitch and bumper are frame-mounted and both are still properly aligned with the bed meaning it was the frame, not the bed, that bent. GM also said it was the frame.
“Despite having some rear-end damage on the pre-production frame, the Colorado ZR2 also finished and took first place in its class,” said Director, Chevrolet Communications, Shad Balch.
Before:
After: