I'm looking to buy another truck. If I"m looking at one of these trucks what should I pay attention to? Other than the standard body, frame, suspension issues.
The LBZ with 6 speed Allison is the most desired and you will pay for that. Of the LLY trucks some have had cooling issues as well as injector connection troubles on #2 & #7 cylinders.
The higher the mileage, the more likely the injectors will be worn. The turbos on both are prone to having a sooted up vane assembly occasionally.