No they actually do, when the engine is almost new and built for this kinda of usage I tend to think that it likes to get driven hard and actually if I would drive it like a granny it wouldn't be good for it either. My driving style can be very harsh sometimes but that's what this car is built to and it's actually very reliable every day car.
And btw aerodynamics in these Sierras are actually quite good for it's time.
Luckily in Finland these cars aren't that rare, spare parts are available in every corner etc. Tho majority of average Sierras aren't in such good condition.