Squarebody trucks have been some of the hottest trucks out there in the collector market for some time, with the next generation OBS trucks (GMT400) not far behind. Don’t just take our word for it. In a 2022 article from Hagerty, Chevy GMT400s trucks have increased in value by 63% over the last three years, while their GMC’s counterparts are up 52%. Overall, these are outstanding trucks however, they do have their issues.

In 1992, the 6.5 L (395 cu in) was introduced to replace the 6.2. These engines had a common issue with overheating. This was mainly due to how the engines were designed, struggling to manage heat, especially when towing heavy loads or in hot weather. Problems with the cooling system, like small radiators or faulty thermostats, made things worse. Despite attempts to fix it in later models, overheating continued to be a big headache for owners.

If you have a Chevy or GMC with one of these engines, and you’re worried about overheating issues, there’s no reason to sweat it.  Our friends at Dieselsite have the solution.