GMC T-Series 1999, Owner'S Manual, Page: 147 / 344

yellow blue
4-31
Power Take
-
Off (PTO) (If Equipped)
Before using a PTO, refer to the body builder’s or
operator’s instructions.
To engage a PTO:
1. Make sure the vehicle is stopped.
2. Shift the transmission into NEUTRAL (N) or
PARK (P), if equipped.
3. The brake or clutch pedal must be pressed and
released once before PTO can be enabled. Do not
hold the brake and clutch pedal down.
4. Move the PTO switch to ON. This sets the PTO base
idle at 1200 rpm.
5. Use the PTO rocker switch to change the engine
speed to the lower preset value of 1400 rpm or the
upper preset value of 1800 rpm. The switch may be
used to toggle between the upper and lower speeds.
The PTO will become inoperative when any of the
conditions are changed or the CHECK GAGES light
comes on.