im both a ford and a chevy fan, but I will put it like this to you.
my dad works for the mines, they buy dozens of trucks at a time. they stopped buying chevy's and only buy fords now. The chevy trucks couldn't handle the abuse of the road conditions, hauling etc etc past 50k.. they literally just fell apart . Only the fords were able to withstand the daily abuse without any major mechanical failure.. ive also heard this from a friend who works as a fleet mechanic. this is real life experience from trusted friends and family who are not biased toward one brand or another. Matter of fact, my dad prefers chevy.
oh, and last but not least, I have another friend who hauls cattle for a living. he loves ford his brother loves chevy. my friend owns about 10 ford trucks. Same thing, the chevy has to downshift on big hill climbs on the highway, mechanical failure etc.. the brother recently switched to Ford.