2009 GMC SIERRA 1500 tow

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Page 227 of 602

GMC SIERRA 1500 2009  Owners Manual This light comes on brie�y when the ignition key is
turned to ON/RUN. If it does not come on then, have it
�xed so it is ready to warn if there is a problem.
{CAUTION:
The brake system might not be wo

Page 230 of 602

GMC SIERRA 1500 2009  Owners Manual If the check engine light comes on and stays on, while
the engine is running, this indicates that there is an
OBD II problem and service is required.
Malfunctions often are indicated by the system bef

Page 235 of 602

GMC SIERRA 1500 2009  Owners Manual Four-Wheel-Drive Light
The four-wheel-drive light
comes on when a vehicle
with a manual transfer
case is shifted into
four-wheel drive and the
front axle engages.
Some delay between the shifting and t

Page 242 of 602

GMC SIERRA 1500 2009  Owners Manual Tire Pressure
If your vehicle has the Tire Pressure Monitor System
(TPMS), the pressure for each tire can be viewed in the
DIC. The tire pressure will be shown in either pounds per
square inch (psi) o

Page 245 of 602

GMC SIERRA 1500 2009  Owners Manual Trailer Gain and Output
On vehicles with the Integrated Trailer Brake Control
(ITBC) system, the trailer brake display appears in the
DIC. Press the trip odometer reset stem until TRAILER
GAIN and OUT

Page 251 of 602

GMC SIERRA 1500 2009  Owners Manual CHECK TRAILER WIRING
On vehicles with the Integrated Trailer Brake Control
(ITBC) system, this message may display and a chime
may sound when one of the following conditions exists:
A trailer with ele

Page 257 of 602

GMC SIERRA 1500 2009  Owners Manual SERVICE TRAILER BRAKE SYSTEM
On vehicles with the Integrated Trailer Brake Control
(ITBC) system, this message displays and a chime
sounds when there is a problem with the ITBC system.
When this messa

Page 258 of 602

GMC SIERRA 1500 2009  Owners Manual TIGHTEN GAS CAP
This message may display along with the check engine
light on the instrument panel cluster if the vehicle’s fuel
cap is not tightened properly. SeeMalfunction Indicator
Lamp on page