Chevrolet/GMC 6.6L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13337828) - 2020 - CRC - 4/17/19
Driving and Operating 41
Conversions and
Add-Ons
Power Take-Off (PTO)
If equipped, the Power Take-Off
(PTO) is a GM Upfitter integrated
system that creates an auxiliary
power source for running add-on
equipment, such as salt spreaders,
snow plows, winches, and lift
buckets. It controls engine speed to
values higher than normal base idle,
PTO integral clutch engagement,
and remote starting and shutdown
of the engine.
PTO Switch
If equipped, there is an available
PTO switch in the auxiliary
switchbank in one of the right side
positions.
When installing PTO aftermarket
equipment, the PTO wiring and
operation recommendations
provided by the service manual and
GM Upfitter documentation must be
strictly followed.
Refer to the bulletins in the GM
Upfitter Integration website
www.gmupfitter.com for the PTO
Operating Description and
Application Guide.
{
Warning
Engine exhaust contains Carbon
Monoxide (CO), which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness or
even death. Never operate PTO
in an enclosed area such as a
garage or building that has no
fresh air ventilation. See “Engine
Exhaust” in the owner’s manual.
{
Warning
If the key is in the ignition (Key
Access) or the RKE transmitter is
in the vehicle (Keyless Access)
during Remote PTO operation,
the vehicle can be shifted out of
P (Park). Even though PTO will
(Continued)
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