Circuit/System Verification
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Engine ON, press 1 on the PTO switch to engage PTO. The PTO indicator will illuminate. The engine RPM should increase to the programmed PTO standby speed (between 800 RPM-1500 RPM) within a few seconds. Press RES + to increase the engine speed and SET - to decrease the engine speed accordingly. Press 0 to disengage PTO and to return the engine speed back to normal idle.