Question

2001 Chevrolet C5500 Duramax with engine code P2160, what does the code refer to and how do I trouble shoot it

Answer 1

The P2160 code means that there is a problem with the Vehicle Speed Sensor 2. Most likely the speed sensor needs to be replaced. Here is more information with a video for the code P2160:

P2160 Chevrolet Code - Vehicle Speed Sensor 2 Circuit Low Voltage
Read more: https://www.autocodes.com/p2160_chevrolet.html