A few days ago, we showed you this 1999 Chevy C3500 that belongs to GM Authority reader Troy Case. The truck recently hit the 600,000-mile mark, and we we can now exclusively show you a video of the exact moment that the Chevy reached this incredible milestone.
As explained previously, Case is a photographer for the LA County Fire Department. He bought the Chevy C3500 for work, needing something that could be driven on many kinds of terrain. Although the power of its 5.7L V8 L31 Vortec engine is sent only to the rear wheels via GM’s 4L80 E transmission, the truck has performed very well even in difficult conditions. An eight-foot long bed and a cabin capable of seating five passengers have also been helpful.
The Chevy C3500 is not entirely stock. Case has upgraded it with a two-inch lift, modern Chevy wheels with a black finish, tint for the glass and a black-painted front grille insert. The chrome exterior moldings have been deleted.
It would have been nice to report that the Chevy C3500 has covered all 600,000 miles on the same drivetrain. Unfortunately, it hasn’t, though it very possibly could have. The gearbox was wrongly changed at 79,000 miles due to a mis-diagnosis: a noise from the rear end was in fact being caused by the axle, yet the dealer wrongly swapped out the transmission instead.
Later, the C3500 failed a smog check due to a valve guide problem in the engine. Either the valve guides or the cylinder heads could have been replaced, but this would have been a lot of work on an engine which had already been used for 408,000 miles. Case instead replaced it with a GM crate motor, which passed the smog check with flying colors. However, he firmly believes that both the stock engine and the transmission would easily have reached 600,000 miles had it not been for these circumstances.
Very large mileages have been reported for other Chevy trucks. In 1996, Wisconsin food distributor Frank Oresnik bought a ’91 C/K with a Chevrolet Small Block V8 when it had 41,000 miles on the clock. He reached one million miles 12 years later.
In an even more dramatic example, Hugh and Tammy Pennington bought a new Silverado 3500 HD fitted with a GM Duramax diesel engine in 2006. They used it both for their trailer delivery business and for long-distance holidays, and hit one million miles in just six years. Like Frank Oresnik, they had done it all on the original engine.
Check out the moment when Troy Case’s C3500 hits the 600,000 milestone in this video: