trailer GMC SIERRA CLASSIC 2007 Repair Manual

Fuses Usage
LT TRNLeft Turn Signals and
Sidemarkers
VEH STOPVehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
RT TRLR ST/TRN Right Turn Signal/Stop Trailer
RT TRNRight Turn Signals and
Sidemarkers
BODY Harness Connector
DDM Driver Door Module
AUX PWR 2, M/GATE Not Used
LCKS Power Door Lock System
ECC, TPMTire Pressure Monitoring
System
TBC 2C Truck Body Controller
HAZRD Flasher Module
CB LT DRSLeft Power Windows
Circuit Breaker
TBC 2B Truck Body Controller
TBC 2A Truck Body ControllerCenter Instrument Panel Fuse Block
The center instrument panel utility block is
located underneath the instrument panel, to the
left of the steering column.
Device Usage
SEO Special Equipment Option
TRAILER Trailer Brake Wiring
UPFIT Uptter (Not Used)
SL RIDERide Control Harness
Connection
602

1*Fuel Injection Rail #2-Gasoline Engine; Engine
Control Module-Diesel Engine.
2*Fuel Injection Rail #1-Gasoline Engine;
Actuator-Diesel Engine.
3*Oxygen Sensors-Gasoline Engine; Fuel
Heater-Diesel Engine.
4*Oxygen Sensors-Gasoline Engine; Engine
Control Module 1-Diesel Engine.
5*Ignition 1-Gasoline Engine; Engine Control
Module-Diesel Engine.
6*Powertrain Control Module B-Gasoline Engine;
Engine Control Module B-Diesel Engine.
7*Supplemental Brake Assist - Gasoline Engine;
Electronic Viscous Fan - Diesel Engine.
8*Rear Climate Control.
9*Sunroof.Fuses Usage
GLOW PLUGDiesel Glow Plugs and Intake
Air Heater
CUST FEED Gasoline Accessory Power
HYBRID Hybrid
STUD #1Auxiliary Power (Single
Battery and Diesels Only)/
Dual Battery (TP2) Do not
install fuse.
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLWR Front Climate Control Fan
LBECLeft Bussed Electrical Center,
Door Modules, Door Locks,
Auxiliary Power Outlet—Rear
Cargo Area and Instrument
Panel
STUD #2*Accessory Power/Trailer
Wiring Brake Feed
ABS Anti-lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
605

Fuses Usage
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
PARK LP Parking Lamps Relay
STRTR Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
SEO B2 Off-Road Lamps
4WS Not Used
AUX PWRAuxiliary Power Outlet —
Console
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake
Controller-Gasoline Engine,
Fan Clutch-Diesel EnginesFuses Usage
IGN EInstrument Panel Cluster, Air
Conditioning Relay, Turn
Signal/Hazard Switch,
Starter Relay
RTD Ride Control
TRL B/U Backup Lamps Trailer Wiring
F/PMP Fuel Pump (Relay)
B/U LPBack-up Lamps, Automatic
Transmission Shift Lock
Control System
RR DEFOG Rear Window Defogger
HDLP-HI Headlamp High Beam Relay
PRIME Not Used
AIRBAGSupplemental Inatable
Restraint System
FRT PARKFront Parking Lamps,
Sidemarker Lamps
DRLDaytime Running
Lamps (Relay)
SEO IGN Rear Defog Relay
TBC IGN1 Truck Body Controller Ignition
HI HDLP-LT High Beam Headlamp-Left
LH HID Not Used
606

(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for
any other loose or damaged safety belt system
parts. If you see anything that might keep a safety
belt system from doing its job, have it repaired.
Have any torn or frayed safety belts replaced. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The
airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders, body door
hinges, hood latch assembly, secondary latch,
pivots, spring anchor, release pawl, tailgate hinges,
tailgate linkage, tailgate handle pivot points,
latch bolt, fuel door hinge, locks, and folding seat
hardware. More frequent lubrication may be
required when exposed to a corrosive
environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Check vent hose at transfer case for kinks and
proper installation.(h)Change automatic transmission uid and lter
if the vehicle Gross Vehicle Weight Rating
(GVWR) is over 8600 lbs or if the vehicle is mainly
driven under one or more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 502 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
624

(k)Inspect system. Check all fuel and vapor lines
and hoses for proper hook-up, routing, and
condition. Check that the purge valve, if the vehicle
has one, works properly.
(m)Change automatic transmission uid and
external transmission lter if the vehicle is mainly
driven under one or more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or delivery
service.
(n)Vehicles with diesel engine or with GVWR
above 10,000 lbs (4 536 kg) only: Inspect shields
for damage or looseness. Adjust or replace as
required. This is a Noise Emission Control Service.
Applicable to vehicles sold in the United States
and recommended for vehicles sold in Canada.
(p)If you drive regularly under dusty conditions,
inspect the lter or change indicator (if equipped)
at each engine oil change.(q)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 629.
At the First 100, 1,000 and 6,000
Miles (160, 1 600 and 10 000 km)
Check dual wheel nut torque. For proper torque,
seeCapacities and Specications on page 609.
625

Manual Windows......................................... 129
Memory Seat and Mirrors.............................. 12
Message
DIC Warnings and Messages................... 270
Mirrors
Automatic Dimming Rearview with
Compass and Temperature Display....... 180
Automatic Dimming Rearview with
OnStar
®, Compass and Temperature
Display................................................. 176
Manual Rearview Mirror........................... 176
Outside Automatic Dimming Mirror........... 187
Outside Convex Mirror............................. 188
Outside Curb View Assist Mirrors............. 187
Outside Heated Mirrors............................ 188
Outside Manual Mirrors............................ 183
Outside Power Foldaway Mirrors.............. 186
Outside Power Mirrors............................. 185
Outside Trailer-Tow Mirrors....................... 183
Outside West Coast-Type Mirrors............. 185
MyGMLink.com............................................ 641
N
New Vehicle Break-In.................................. 134
Noise Control System, Tampering................ 531
Normal Maintenance Replacement Parts..... 632
O
Odometer.................................................... 246
Odometer, Trip............................................ 246
Off-Road Driving.......................................... 372
Off-Road Recovery...................................... 369
Oil
Engine..................................................... 486
Pressure Gage......................................... 262
Oil, Engine Oil Life System ......................... 489
Older Children, Restraints............................. 44
Online Owner Center................................... 641
OnStar
®System, see OnStar®Manual........ 189
Other Warning Devices................................ 213
Outlet Adjustment........................................ 243
Outlet(s), Accessory Power.......................... 228
Outside
Automatic Dimming Mirror........................ 187
Convex Mirror.......................................... 188
Curb View Assist Mirrors.......................... 187
Heated Mirrors......................................... 188
Manual Mirrors......................................... 183
Power Foldaway Mirrors........................... 186
Power Mirrors.......................................... 185
Trailer-Tow Mirrors................................... 183
West Coast-Type Mirrors.......................... 185
668

Tires (cont.)
Uniform Tire Quality Grading.................... 559
Wheel Alignment and Tire Balance........... 560
Wheel Replacement................................. 560
When It Is Time for New Tires................. 555
Tonneau Cover............................................ 203
Tow/Haul Mode........................................... 147
Tow/Haul Mode Light................................... 264
Towing
Power Take-Off (PTO).............................. 461
Recreational Vehicle................................. 424
Towing a Trailer....................................... 429
Your Vehicle............................................. 423
Traction
Assist System (TAS)................................ 363
Manual Selectable Ride........................... 365
Off Light.................................................. 256
Trailer
Recommendations.................................... 460
Transmission
Fluid, Automatic..............................494, 497
Fluid, Manual........................................... 500
Temperature Gage................................... 257
Up-Shift Light........................................... 254
Transmission Operation, Automatic.............. 140Transmission Operation, Manual.................. 149
Trip Odometer............................................. 246
Truck-Camper Loading Information.............. 421
Turn and Lane-Change Signals................... 214
Turn Signal/Multifunction Lever.................... 214
U
Understanding Radio Reception................... 350
Uniform Tire Quality Grading....................... 559
Universal Home Remote System........191, 192
Operation........................................193, 198
Up-Shift Light.............................................. 254
V
Vehicle
Control..................................................... 360
Damage Warnings....................................... 5
Loading.................................................... 409
Symbols...................................................... 5
Vehicle Customization, DIC......................... 282
Vehicle Data Collection and Event Data
Recorders................................................ 650
673