Chevrolet Equinox Fuel Cell Owner's Manual page 186

The IR-Fueling Communication system is located on the
vehicle above the fueling receptacle.
The communication system may not work if the fuel cell
system is not turned off, the parking brake is not set
firmly, or the shift lever is not in PARK (P).
•
No LED: Vehicle is not ready for fueling. Do not
connect the fueling nozzle.
•
Yellow LED: Vehicle is ready for a
non-communication fueling operation
5-6
•
Green LED: Vehicle is ready for a communication
fueling operation.
•
Yellow LED blinking: Vehicle interrupted
communication.
Find the station communication system.
If the fueling dispenser has an IR-Interface no further
action is required.
If the fueling dispenser has the hardwired connector, but
no IR-Interface, connect the plug to your vehicle.
If no communication system is available, no further
action is required.