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24-12
ENGINE CONTROLS: 5.3L
Cooling
fan
speed
signal
Generator
field
duty
cycle signal
AC
refrigerant
pressure
sensor
signal
POWERTRAIN
CONTROL
MODULE
(PCM)
Connector
Generator
turn-on
signal
GRY
0.35
BLK
0.35
RED/BLK
0.35
GRY
0.35
GRY
0.35
WHT/BLK
0.35
RED
0.35
GRY
0.35
Charging System
Engine Cooling Fans
30
60
15
75
C2
45
80
14
8
C1
42
C1
Air Conditioning: Manual
Air Conditioning: Automatic
DK BLU
0.35
C1
C2
Low
reference
Cooling
fan clutch
control
Engine
speed
signal
10
C2
WHT
0.35
43
C2
DK GRN/
WHT
0.35
A/C
compressor
clutch
relay
control
Gauges
Low
reference
5 volt
reference
5 volt
reference
Air Conditioning: Manual
Air Conditioning: Automatic
Circuit Schematic
24-13
ENGINE CONTROLS: 5.3L
5V
Reference
Delivered
torque
signal
Crank
request
signal
POWERTRAIN
CONTROL
MODULE
(PCM)
Connector
Anti–lock Brake
System (ABS)
Gauges
7
63
5
13
C1
18
58
C2
C1
C2
Low
reference
33
C1
DK GRN
0.35
TAN/
WHT
0.35
PPL
0.35
TCC brake
switch/
cruise
control
release
signal
Starting
System
Cruise Control
Oil
pressure
switch
signal
GRY
0.35
BLK
0.35
16
C2
4WD
low
signal
GRY/
BLK
0.35
Requested
torque
signal
C2
TAN/
BLK
0.35
Transfer
Case
Control
ORN/BLK
0.35
Circuit Schematic
24-14
ENGINE CONTROLS: 5.3L
(Refer to Section 201 for photographs.)
Component
Photo No.
Accelerator Pedal Position (APP)
Sensor (5.3L)
On the accelerator bracket
63
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft Position (CMP)
Sensor (5.3L)
Top rear of engine
19
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Position (CKP)
Sensor (5.3L)
Right rear of engine, near starter
48
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Brake Control
Module (EBCM)
Inner left side frame rail (near transmission)
41
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Coolant Temperature
(ECT) Sensor (5.3L)
Left front of engine
24
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporative Emission (EVAP)
Canister Purge Solenoid
(5.3L)
Top of engine
22
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporative Emission (EVAP)
Canister Vent Solenoid
Rear of the fuel tank
115
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injector 1 (5.3L)
Top left side of engine
. . . . . . . . . . .
Fuel Injector 2 (5.3L)
Top right side of engine
. . . . . . . . . . .
Fuel Injector 3 (5.3L)
Top left side of engine
. . . . . . . . . . .
Fuel Injector 4 (5.3L)
Top right side of engine
. . . . . . . . . . .
Fuel Injector 5 (5.3L)
Top left side of engine
. . . . . . . . . . .
Fuel Injector 6 (5.3L)
Top right side of engine
. . . . . . . . . . .
Fuel Injector 7 (5.3L)
Top left side of engine
. . . . . . . . . . .
Fuel Injector 8 (5.3L)
Top right side of engine
. . . . . . . . . . .
Fuel Pump and Sender
Assembly
Inside the fuel tank
. . . . . . . . . . . . . . . .
Fuel Tank Pressure (FTP)
Sensor
At top left rear of fuel tank
115
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Rear
Under the left rear seat
52
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Underhood
Left side of engine compartment
3
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Oxygen Sensor (HO2S)
Bank 1 Sensor 1 (5.3L)
Left exhaust downpipe
47
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Oxygen Sensor (HO2S)
Bank 1 Sensor 2 (5.3L)
Left exhaust pownpipe
47
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Oxygen Sensor (HO2S)
Bank 2 Sensor 1 (5.3L)
Right exhaust downpipe
46
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Oxygen Sensor (HO2S)
Bank 2 Sensor 2 (5.3L)
Right exhaust downpipe
46
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel Cluster
(IPC)
On the left side of the IP, above the steering column
59
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Knock Sensor (KS) 1 (Left)
(5.3L)
On top rear of engine
. . . . . . . . . . . . . . . . . . . .
Knock Sensor (KS) 2 (Right)
(5.3L)
On top rear of engine
. . . . . . . . . . . . . . . . . . . .
Manifold Absolute Pressure
(MAP) Sensor (5.3L)
Top of engine
22
. . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mass Air Flow (MAF) Sensor/
Intake Air Temperature
(IAT) (5.3L)
Right front of engine compartment
21
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
24-15
ENGINE CONTROLS: 5.3L
(Refer to Section 201 for photographs.)
Component
Photo No.
Powertrain Control Module
(PCM) (5.3L)
Left front of engine compartment
25
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Lamp Switch
On brake pedal support
64
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Actuator Control
(TAC) Module (5.3L)
Left rear of engine compartment
18
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body
Right front of engine compartment
21
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle Speed Sensor (VSS)
(2WD)
Right rear of transmission
42
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle Speed Sensor (VSS)
(4WD)
Left rear of transfer case
44
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
C101 (38-BLK)
Left side of engine compartment
3
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C107 (5.3L) (38-BLK)
Left rear of engine compartment
18
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C115 (5.3L) (2-BLK)
Top of engine
22
. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C310 (2-BLK)
Right side of transmission
45
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G107 (5.3L)
Lower left side of engine
38
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G108 (5.3L)
Lower left side of engine
38
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G305
Outside of left frame rail, near fuel tank
36
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
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