GMC HUMMER EV 2022 Owner's Manual page 288

(DIC). The infotainment display will also
show the connection issue in the Lights
Status view.
Connection Trailer Lighting Faults Detected
The Trailering App System monitors for
electrical faults on the trailer lights.
A message about the lighting issue will
appear on the DIC. The infotainment display
will also show the lighting issue in the
Lights Status view. Repair your trailer lights
if needed. A trailer lighting issue is not
covered by your GM warranty.
The Running Lights connection may not
detect partial outages. Activate the light test
to check all trailer lamps. See Light Test
following.
Light Test
Touch Start Light Test to cycle the trailer
lights on and off to determine if they are
working. The test follows this sequence:
1. The running lights turn on first and
remain on throughout the sequence.
2. The brake lights turn on for about
two seconds.
3. The left turn signal light flashes three
times.
4. The right turn signal light flashes three
times.
5. The reverse lights turn on for about
two seconds.
6. Steps 2-5 repeat for approximately on
minute and 45 seconds, or until the test
deactivates.
Touch Stop to stop the test. The test will
automatically end after one minute and
45 seconds.
The sequence also deactivates when any of
the following occur:
The vehicle is turned off.
The vehicle is shifted out of P (Park).
The brake pedal is pressed.
The turn signal is activated.
The hazard warning lights are activated.
Driving and Operating
Tires
Tire Pressure and Temperature
If the TTPMS sensor-to-vehicle learn process
was completed, the status view will display
the current tire pressure and temperature of
the trailer tires related to the active Trailer
Profile. If a tire s pressure is low or high, the
color of the pressure value will be amber.
If a sensor malfunctions, the values are
dashed lines. If the screen displays Service
Tire Pressure Monitoring System, the
vehicle needs to be taken to a dealer for
service.
Touch to set up the Trailer Tire Pressure
Monitoring System (TTPMS) for the Trailer
Profile. See Trailer Tire Pressure Setup
previously in this section for details on the
setup. Also, touch Sensor Setup if the trailer
tires were rotated or if the tire pressure
sensors in the tires were replaced for this
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