17-21 GM Duramax L5P HP Tuners SOTF Switch Compound SW# 5: Like # 4

SW# 5: Like # 4 + added Timing

fast engagement

(1) - EGR Valve Gasket

Ford scanner required to update the TCM with the new solenoid code and initiate a relearn - very critical component to make sure the transmission works properly

Improved Shift Points and Shift Firmness

17-21 GM Duramax L5P HP Tuners SOTF Switch Compound SW# 5: Like # 4Change maps at the turn of a switch. Diesel Switch by HP Tuners lets you power up from a stock calibration to one of five custom maps with the turn of a switch. Pair with HP Tuners Switch on the Fly OS for complete control and performance. Diesel Switch features: 5 OBDII pass through cable Knurled aluminum switch knob and position dial Six position rotary switch There are many possible mounting solutions for the Diesel Switch in your trucks cabin. HP