Mater
+1y
Not to get in the middle of this.... Bullydog does not make a chip for the 6.5l GM (Detroit Diesel), Banks does not make a chip for the 6.5L diesel. To my knowledge no one make a chip for it. Because the injectors are not computer controlled. They are indirect injected engines. You cannot, cannot push the injectors to make for more fuel in an indirect injected diesel because you will skyrocket the engine temprature. The 6.5L is an 18:1 and in late models a 20.2:1 compression engines to overcome the lack of advancing fuel curves that modern direct injected diesels have. You are talking about an engine that made maybe 215hp. In my 10+ yrs of wrench time on diesels the only major problems that the 6.5L suffered from was overheating, inj pumps going bad due to the optical sensor inside it from poor fuel quality ( people not changing fuel fitlers ), oil leaks from the pan and cracked heads on early models due to poor casting.