I've got an 04 Silverado Z-71. It's got the digital climate control and the knob on the driver's side is really acting up. It takes me pushing and pulling on the spin part of the knob with alot of spins to get it to where I need it. I pulled the unit out and got the part number off of it...part #15107733. I've looked and come across units that look the same but have different part numbers. Does anyone know if the ac/heater controls are basically the same with different part numbers for different vehicles (Tahoe/Silverado, etc.) or if they are different based on package deals (LT, etc)? Any help would be greatly appreciated.