Here is how you can tell if a Duramax has traction control.
You go out on a back road somewhere (for safety sake). Oh and this works a lot better if it is raining or the pavement is wet bye the way but results will vary.
Ok, put the truck in drive and hold the brake as hard as you can or just enough to keep the truck from moving at all times during the test. Then you slowly push on the accelerator until the rear tires start to spin. Then when they start to spin, you mash the accelerator to the floor. At this point it might be kind of hard to tell if the truck has traction control or not because it is making so much noise but here's the trick. When, and only when you can tell that you have run through all 5 gears and the speedo is at least to 100 mph, is when you can be sure that the truck does not in fact have traction control.
This is by far the best way to tell if the truck has traction control or not, and it has been the standard in testing for many years.
Let us know how the test works.
