Lantley wrote:
THe Duramax cooling issues were resolved for the most part with the intro of the LBZ motor in 2006. Really hasn't been an issue for over a decade.
Really not an issue for the modern Duramax's of today's era
I agree, hasn't been an issue since 05.
What I did say was that they (GM) say they have made the cooling system more robust to be able to tow 35,000+ like the other two. They mentioned their bigger cooling fan, bigger grill, bigger radiator, bigger oil cooler, etc. as improvements to tow the heavier loads. The Duramax hasn't changed much other than that (still 445hp/910tq). So my theory is maybe the cooling system was one of the weak links that held it back to 23,000# towing when the competition was 35k.
The topic of the thread is what folks think was the weak link....
The point of bringing up the LLY overheaters is that GM took a bit of a beating over that screw up, so they would not want to repeat that negative press by screwing up this new one, so they probably didn't want to artificially jack up the rating to keep up with the competition and have the trucks overheat going up the Ike for example. Also, for the SAE towing specs to be met, they have to tow their rated load up a grade, in the heat, without any warning lights coming on.
