Description

This is a voltage knob made for PCM controlled 05+ GM vehicles with the small rectangular 2 pin plug. Harnesses to use this item without a battery light plug and play will be available separately in the future.

They work on up to 4 alternators of the same type, if you’re looking for an alternative to wiring externally regulated setups for newer vehicles this is the option for you! 

This does NOT work on any other vehicle, and is made to work on PCM controlled vehicles only. 05-2020 GM 2 pin plug vehicles. The maximum voltage is 15.5v on brand x and OEM installed regulators. Some brands have a max of less if they use a lesser quality Chinese aftermarket regulator. 

There is no return policy on this item if it was installed.

Installation is relatively straight forward. Red wire on the knob will go to ignition. Black wire to ground. Plug this into the alternator.