GMC duramax diesel 2016 Supplement Manual page 85

84 Driving and Operating
PTO: SET PARK BRAKE
(Stationary only)
PTO: PRESS & RELEASE
BRAKE (Mobile only)
PTO: RELEASE BRAKE
PTO: REDUCE VEHICLE
SPEED
PTO: REDUCE ENGINE SPEED
PTO: DISENGAGE CRUISE
CONTROL
In addition, the PTO indicator light
will light when all conditions
required to engage PTO have not
been met. When enabling PTO, the
PTO indicator light will turn on, then
turn off after one second. Under
normal operating conditions, the
PTO indicator light will remain on
throughout the PTO operating cycle.
Additional in-vehicle PTO module
information can be accessed by the
service technician to aid in
troubleshooting. Also see the
service manual for more
information.
The GM service technician can
access Service Tool information that
will contain reasons why PTO may
not engage and why PTO may
unexpectedly disengage due to
system conditions.
See http://www.gmupfitter.com for
information on the installation of
wiring and programming for PTO
aftermarket equipment.