every Hummer owner knows the battle with cooling and today we will be adding the new better duramax fan. The new Duramax fan is larger than stock which means you have to trim it down. Our solution which didn’t work the best was to clamp a grinder onto the frame and then slowly rotate the fan to make the cuts as even as possible.
Learn from our mistakes. While this seemed like a great idea, and we still think it is, you need a better cutting blade than we used. The thin blade normally used to cut metal did go through the plastic but it also got all gummed up and proved very slow and annoying. The cuts were even but we had to still go back with a razor knife and trim off a lot of melted plastic.