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Pocketmags Digital Magazines
Pocketmags Digital Magazines



Project LML has been a long process, but now, after a full year of ownership, it’s made quite the transformation from a run-of-the-mill, highmileage stock truck to the 600 hp trailer-towing monster you see now.

With upgrades to the tuning, turbo system, suspension, transmission and, of course, some cosmetic bolt-ons, there hasn’t been a load this truck couldn’t handle with ease. Running 80 mph and pulling 6th gear over 6 percent grades, towing the family travel trailer through the mountain ranges of Utah is basically a nonissue. The truck has all the power a guy could need, with more throttle always on tap.

However, on the hottest summer days, there has been one thing slowing us down: coolant temperatures. With the ProMax 64 turbocharger and custom GDP tuning, the LML has an incredible power and torque curve that allows the truck to run any gear at any speed it wants while towing. Nevertheless, on long, strenuous, uphill pulls, the coolant temperatures have been known to climb north of 220 degrees. As of the next round of upgrades, the cooling system will be addressed to make it more efficient and effective while towing.

The truck has 130,000 miles on it now; and because I have no knowledge of any past cooling system services, replacing the antifreeze with new is the first big thing. Checking the exterior of the radiator for any blockages or debris buildup is the next step, and installing new thermostats would also be a good idea.

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About Diesel World

Diesel World April/May 2019, Towing Exp : Duramax Cooling Upgrades, Frontline Defenders, Two Epic Tribute Trucks Inside, And More......