GMC 2016 Silverado Manual page 18

3. The manual shutoff is near the
fuel fill valve on the driver side
of the tank shield in the
pickup bed.
A label is on the outside of the
vehicle near the manual shutoff
valve. Do not remove this label.
Driving and Operating
Turn the lever one-quarter turn
clockwise to turn off.
Do not drive the vehicle. The vehicle
should be towed to an authorized
GM dealer.
Do not add anything to the vehicle
that will cover the CNG fuel storage
system or restrict access to the
manual shutoff valve. See
Accessories and Modifications 0 22.
17