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Maintenance When Trailer Towing The vehicle needs service more often when pulling a
trailer. See this manual’s Maintenance Schedule or Index
for more information. Things that are especially important
in trailer operation are automatic transmission uid,
engine oil, axle lubricant, belts, cooling system and brake
system. It is a good idea to inspect these before and
during the trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring Harness Heavy-Duty Trailer Wiring Package
The vehicle is equipped with the seven-wire trailer
towing harness. This harness with a seven-pin universal
heavy-duty trailer connector is attached to the rear
bumper beam. It is located next to the integrated trailer
hitch. The seven-wire harness contains the following trailer
circuits:
Yellow: Left Stop/Turn Signal
Dark Green: Right Stop/Turn Signal
Brown: Taillamps
White: Ground
Light Green: Back-up Lamps
Red w/ Black Stripe: Battery Feed*
Dark Blue: Trailer Brake*
*The fuses for these two circuits are installed in the
underhood electrical center, but the circuits are
not connected. They should be installed by your dealer
or a qualied service center.
If charging a remote (non-vehicle) battery, press the
Tow/Haul mode button, if equipped, located at the end of
the shift lever. This will boost the vehicle system voltage
and properly charge the battery. If the trailer is too light
for Tow/Haul mode, or the vehicle is not equipped with
Tow/Haul, turn on the headlamps as a second way to
boost the vehicle system and charge the battery.
5-56

Electric Brake Control Wiring
Provisions These wiring provisions are included with the vehicle
as part of the heavy-duty trailer wiring package.
These provisions are for an electric brake controller.
The red/black stripe power feed will not be connected
to the battery until the ring terminal is unstowed and
connected to the underhood electrical center. The
instrument panel contains blunt cut wires near the data
link connector for the trailer brake controller. The harness
contains the following wires:
Dark Blue: Auxiliary
Red/Black: Battery
Light Blue/White: Brake Switch
White: Ground
The trailer brake controller should be installed by your
dealer/retailer or a qualied service center. Trailer Recommendations Subtract the hitch loads from the Cargo Weight Rating
(CWR). CWR is the maximum weight of the load
the vehicle can carry. It does not include the weight of
the people inside, but you can gure about 150 lbs.
(68 kg) for each passenger. The total cargo load must
not be more than the vehicles CWR.
Weigh the vehicle with the trailer attached, so the
GVWR or GAWR are not exceeded. If using a
weight-distributing hitch, weigh the vehicle without
the spring bars in place.
The best performance is obtained by correctly spreading
out the weight of the load and choosing the correct
hitch and trailer brakes.
For more information see Towing a Trailer on page 5-44 .
5-57

Appearance Care (cont.)
Weatherstrips ............................................ 6-100
Windshield, Backglass, and Wiper Blades ...... 6-102
Wood Panels ............................................ 6-100
Ashtray ......................................................... 3-26
Assist Handles ............................................... 2-63
Audio System ................................................. 3-75
Audio Steering Wheel Controls .................... 3-115
Radio ........................................................ 4-62
XM™ Satellite Radio Antenna System ........... 3-117
Audio Systems
Radio Reception ........................................ 3-116
Rear Seat (RSA) ....................................... 3-113
Theft-Deterrent Feature ............................... 3-115
Automatic Headlamp System ............................ 3-21
Automatic Transmission
Fluid .......................................................... 6-20
Operation ................................................... 2-29
Autoride ®
....................................................... 5-44
Axle, Rear ..................................................... 6-46B Back-Up Lamps - Ambulance Body
Bulb Replacement ....................................... 6-51
Battery .......................................................... 6-39
Electric Power Management .......................... 3-24
Run-Down Protection ................................... 3-25
Belt Routing, Engine ....................................... 7-16
Bench Seat, Split (60/40) ................................. 1-11
Bluetooth ®
..................................................... 3-75
Brake
Emergencies ................................................ 5-6
Pedal and Adjustable Throttle ........................ 2-27
Brakes .......................................................... 6-36
Antilock ....................................................... 5-5
Parking ...................................................... 2-34
System Warning Light .................................. 3-39
Braking ........................................................... 5-4
Braking in Emergencies ..................................... 5-6
Break-In, New Vehicle ..................................... 2-24
Bucket Seats, Rear ......................................... 1-17
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Parking
Assist ........................................................ 2-42
Brake ........................................................ 2-34
Over Things That Burn ................................. 2-38
Passenger Airbag Status Indicator ..................... 3-37
Passenger Sensing System .............................. 1-87
Passing ......................................................... 5-12
PASS-Key ®
III+ Electronic Immobilizer ............... 2-22
PASS-Key ®
III+ Electronic Immobilizer
Operation ................................................... 2-23
Perchlorate Materials Requirements, California ...... 6-4
Phone
Bluetooth ®
.................................................. 3-75
Power
Door Locks ................................................. 2-10
Electrical System ....................................... 6-105
Liftgate ...................................................... 2-14
Lumbar Controls ........................................... 1-4
Reclining Seatbacks ...................................... 1-8
Retained Accessory (RAP) ............................ 2-26
Seat ............................................................ 1-3
Steering Fluid ............................................. 6-33
Windows .................................................... 2-18
Power Assist Steps ......................................... 2-16
Pregnancy, Using Safety Belts .......................... 1-50
Privacy .......................................................... 8-16
Navigation System ....................................... 8-18
OnStar ....................................................... 8-18
Radio Frequency Identication (RFID) ............. 8-18
Problems with Route Guidance ......................... 4-61 Program
Courtesy Transportation ................................ 8-10
Programmable Automatic Door Locks ................. 2-11
Proposition 65 Warning, California ....................... 6-4
R Radio Frequency
Identication (RFID) ..................................... 8-18
Radios
Reception ................................................. 3-116
Theft-Deterrent .......................................... 3-115
Rainsense™ II Wipers ..................................... 3-10
Reading Lamps .............................................. 3-24
Rear Air Conditioning and Heating System
and Electronic Climate Controls ..................... 3-32
Rear Axle ...................................................... 6-46
Locking ........................................................ 5-9
Rear Door Security Locks ................................ 2-11
Rear Heated Seats ......................................... 1-10
Rear Seat Armrest .......................................... 2-65
Rear Seat Audio (RSA) System ....................... 3-113
Rear Seat Entertainment System .............. 3-87, 3-97
Rear Side Window Antenna ............................ 3-117
Rear Storage ................................................. 2-65
Rear Vision Camera (RVC) .............................. 2-48
Rear Window Washer/Wiper ............................. 3-12
Rearview Mirrors ............................................. 2-40
Automatic Dimming ...................................... 2-40
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