TCDiesel - If I understand what you're saying, you're referring to coolant used for heavy duty diesel application (OTR). My light duty truck is not the same nor are the fluids spec'd for it. However, it wouldn't hurt to use the same coolant as the OTR guys. Although my truck will never see 500K plus miles in 5/6 years, or in its lifetime for that matter. I figure I'm well protected if I use use Zerex G05 and change it every three years, regardless of mileage in between. I know it's overkill, but I like working on my truck. Well, except when something fails... like a water pump.
Again, thanks for the responses.