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Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
WARNING:Always disconnect the battery before servicing high
current fuses.
WARNING:To reduce risk of electrical shock, always replace
the cover to the Power Distribution Box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
The high-current fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
1 Relay Blower motor/Variable blower
control (Dual Zone Climate
Control)
2 Relay Electronic Shift-on-the-Fly
(ESOF) Lo-Hi
3 Relay Heater mirror
4 — Not used
5 30A* Trailer Brake Controller (TBC)
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
6 40A* ABS module (Pump)
7 30A* Upfitter auxiliary switch #1
8 30A* Upfitter auxiliary switch #2
9 40A* ABS module (Coil)
10 20A* Cigar lighter
11 20A* Instrument panel power point
12 15A** Brake On/Off (BOO) relay feed
13 5A ** Brake switch, Brake switch relay
coil, SJB module, 4x4 module
14 — Not used
15 — Not used
16 Relay A/C clutch
17 Relay Wipers
18 Relay Fuel Pump Driver Module
(FPDM), Fuel injectors (Gasoline
engines), Diesel Fuel Control
Module (DFCM) (Diesel engine)
19 Relay Back-up lamps, Reverse Sensing
System (RSS), Engine
compartment fuse 63
20 Relay Trailer stop/turn (Left)
21 Relay Trailer stop/turn (Right)
22 Relay Stop lamps, Center
High-Mounted Stop Lamp
(CHMSL), TBC, Customer access
23 15A** Heater mirror, Heated spotted
mirror
24 40A* Blower motor relay
25 — Not used
26 30A* ESOF relay lo-hi
27 50A* Glow Plug Control Module
(GPCM) #1 (Diesel engine only)
28 20A* Heated mirror relay
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
29 30A* Passenger power seat
30 10A** A/C clutch relay
31 15A** Power fold mirror relay
32 20A** Fuel pump relay
33 20A** Back-up lamp relay
34 25A** Trailer stop/turn relay
35 5A** ESOF relay coils
36 10A**Gasoline engines:Powertrain
Control Module (PCM) keep alive
power, Canister vent
Diesel engine:Engine Control
Module (ECM) keep alive power
37 10A** Transmission Control Module
(TCM) (Diesel engine only)
38 — Not used
39 50A* ECM power (Diesel engine)
40 30A* Starter relay
41 20A* Power point (Center console -
Front)
42 30A* Trailer park lamp relay
43 20A* Power point (Center console -
Rear)
44 30A* Trailer battery charge relay
45 30A* Driver power seat or Memory
module
46 40A* Run/Start relay
47 50A* GPCM #2 (Diesel engine only)
48 30A* ESOF relay hi-lo
49 30A* Wiper motor
50 30A* PCM relay coil, PCM relay
(Gasoline engines only)
51 — Not used
52 — Not used
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
53 Relay PCM power bus (Fuses 68, 70,
72, 74, 76) (Diesel engine only)
54 Relay Starter solenoid
55 Relay Trailer tow park lamps
56 Relay Trailer tow battery charge
57 Relay Power Distribution Box (PDB)
bus (fuses 67, 69, 71, 73, 75, 77)
SJB Run /Start bus (Fuses 29–37,
46)
58 Relay ESOF hi-lo
59 Relay PCM power bus (Fuses 68, 70,
72, 74, 76) (Gasoline engines
only)
60 Diode One touch start (OTIS)
61 Diode A/C clutch
62 Diode Fuel pump
63 15A** Trailer tow back-up lamps
64 5A** Mirror marker lamps
65 — Not used
66 — Not used
67 — Not used
68 — Not used
69 — Not used
70 10A**Gasoline engines:A/C clutch
relay coil, Refrigerant
Containment Switch, Heated PCV
Diesel engine:A/C clutch relay
coil, Clutch switch, Fuel pump
cooler, A/C cycle pressure switch
71 5A** Fuel pump relay diode,
PCM/ECM Run/Start power
72 15A**Gasoline engines:Ignition coils
Diesel engine:Engine TCM
73 2A** Reverse Camera System (RCS)
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
74 20A**Gasoline engines:VPWR:
HEGO, CMS, MAFS, EVMV,
CMCV, VCT, IMTV
Diesel engine:VPWR: Engine
loads
75 5A** Back-up relay coil power
76 20A**Gasoline engines:VPWR: PCM
Diesel engine:VPWR: ECM
77 10A** ABS module logic
* Cartridge fuses ** Mini fuses
CHANGING A FLAT TIRE
If you get a flat tire while driving:
•do not brake heavily.
•gradually decrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowly move to a safe place on the side of the road.
Your vehicle may be equipped with a conventional spare tire that is
different in one or more of the following: type, brand, size, speed rating
and tread design. If this is the case, this dissimilar spare tire is still rated
for your vehicle loads (GAWR and GVWR).Temporary spare tires are not
equipped with Tire Pressure Monitor System (TPMS) sensors if the
system is present.
WARNING:The use of tire sealant may damage your Tire
Pressure Monitoring System (if equipped) and should not be
used.
WARNING:If your vehicle is equipped with a Tire Pressure
Monitoring System, refer toTire Pressure Monitoring System
in theTires, Wheels and Loadingchapter for more information. If the
tire pressure monitor sensor becomes damaged, it will no longer
function.
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Power distribution box
(see Fuses) ...............................321
Power door locks ......................153
Power mirrors ...........................111
Power point ...............................107
Power steering ..........................280
fluid, checking and adding ....394
fluid, refill capacity ................404
Power Windows .........................108
Preparing to drive your
vehicle ........................................281
R
Radio ................................26, 28, 35
Rear seat entertainment
system ..........................................51
Relays ........................................316
Remote entry system ...............157
illuminated entry ............162–163
locking/unlocking
doors ................................153, 158
replacing the batteries ...........160
Reverse camera .........................292
Reverse sensing system ...........289
Roadside assistance ..................313
S
Safety belts (see Safety
restraints) ..........................178–183
Safety defects, reporting ..355–356
Safety restraints ................178–183
Belt-Minder...........................186
extension assembly ................189
for adults .........................179–183
for children .............................200lap belt ....................................184
warning light and
chime ...............................185–186
Safety restraints - LATCH
anchors ......................................212
Safety seats for children ..........204
Safety Compliance
Certification Label ....................409
Satellite Radio Information ........47
Seats ..........................................169
child safety seats ....................204
cleaning ...................................364
heated ........................................84
memory seat ...................159, 174
SecuriCode keyless entry
system ........................................163
SecuriLock passive anti-theft
system ................................165, 167
Servicing your vehicle ..............367
Setting the clock
AM/FM/CD .................................30
AM/FM/In-dash 6 CD ................37
Snowplowing ...............10, 310–311
Spark plugs,
specifications .....................403, 408
Special notice ..............................11
ambulance conversions ............10
diesel-powered vehicles ...........10
four-wheel drive vehicles .......312
utility-type vehicles ..................10
Speed control ............................116
Starting your vehicle ........272–274
jump starting ..........................342
Steering wheel
controls ....................................118
tilting .......................................104
SYNC..........................................79
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Index
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