YMMS: 2012 Chevrolet Silverado 1500 Nov 22, 2024

Engine: 5.3L Eng License:

VIN: Odometer:

TRANSMISSION > 5.3L VIN 7

Fig 1: 5.3L VIN 7, A/T Circuit (1 of 2)

HOT W/ RUN/CRANK HOT AT
RELAY ENERGIZED ALL TIMES
UNDERHOOD
FUSE BLOCK
TCM-BATT (LEFT SIDE
MISC IGN EXTERIOR FUSE 14 OF ENGINE
FUSE 43 LIGHTS 10A
POWER 10A TRANS IG1 COMPT)
(LOWER LEFT SYSTEM
DISTRIBUTION FUSE 19
SIDE OF SYSTEM 15A
DASH)
LEFT I/P

X5
PNK G3

P3

N4

N3
X2
B1
JUNCTION
BLOCK PNK W/O 2 SPEED W/ 2 SPEED
A4 LT BLU/WHT
LT BLU/WHT

RED/WHT
PNK TRANSFER CASE TRANSFER CASE

LT BLU/WHT

LT BLU/WHT
A3 PNK

PNK/WHT
PNK PNK ANTI-LOCK
BRAKES
X1
SYSTEM
G X205
J130
EXTERIOR

PNK/WHT

PNK/WHT
PNK/WHT

PNK/WHT
B PNK
LIGHTS
SYSTEM

LT BLU/WHT A LT BLU/WHT
A

PNK/WHT
PNK/WHT
X205
STOP LAMP SWITCH
(TOP OF BRAKE PEDAL ASSEMBLY)

1 BRN 418 BRN

TCC PWM CTRL 1
2 LT GRN 1222 LT GRN
SOL 1 VLV CTRL 2
3 ORG 1983 ORG
ISS SIG 3
4
5 ORG/BLK 6399 ORG/BLK
REPLICATED TOS SIG 4
6 TAN 2501
COMPUTER
HI SPD GMLAN DATA (-)
7 TAN/BLK 2500 DATA LINES
HI SPD GMLAN DATA (+) SYSTEM
8
9
10
11 DK BLU 5985 PNK/WHT
ACC WAKE UP DATA 5
12
13
14
15
16 LT GRN/BLK 822
VSS LOW SIG
17 LT BLU/WHT 1229 LT BLU/WHT
PC SOL LOW SIG 6
18
19
20 YEL/BLK 1223 YEL/BLK
SOL 2 VLV CTRL 7
21
22
23 GRY 773
TR SW SIG 1
24
25 TAN/BLK 422 TAN/BLK
TCC SOL VALVE CTRL 8
26
27
28
29 TAN/WHT 771
TR SW SIG A
30 TAN 2762 TAN
LOW REF 9
31 PNK/WHT 2139
IGN 1 VOLT
32 RED/WHT 1840
BAT POS VOLT
33
34
35 YEL/BLK 1227 YEL/BLK
TFT SENS SIG 10
36
37 TAN 2501
HI SPD GMLAN DATA (-) COMPUTER
38 TAN/BLK 2500 DATA LINES
HI SPD GMLAN DATA (+) SYSTEM
39 WHT 776
TR SW SIG P
40 ORG/BLK 1228 ORG/BLK
PC SOL HI CTRL 11
41 PPL/WHT 821
VSS HI SIG
42 LT BLU/WHT 6311
BRK SW SIG
43
44
45 LT BLU 1984 LT BLU
LOW REF 12
46 YEL 772 ORG/BLK
TR SW SIG B 13
47
F TAN/WHT

W ORG/BLK

48
WHT

H GRY
G YEL

49 BLK/WHT 451
X175

X179

GND
BLK/WHT
N
I

TRANSMISSION CONTROL
MODULE (TCM)
(LEFT FRONT OF ENGINE J106
DK GRN/WHT
LT GRN/BLK

COMPT, NEAR FAN SHROUD)

GRY/WHT
PPL/WHT

BLK/WHT
RED/BLK

YEL/BLK

J106
BLK/WHT

ORG

BLK/WHT
D
A

A
B

B
E

G103 G106 B P A C
(EXCEPT 4.3L) (4.3L) G103 G106
P/N
(ON FRONT (RIGHT REAR (EXCEPT 4.3L) (4.3L)
OF RIGHT OF ENGINE) (ON FRONT (RIGHT REAR
CYLINDER HEAD) OF RIGHT OF ENGINE)
VEHICLE SPEED PARK/NEUTRAL POSITION (PNP) SWITCH CYLINDER HEAD)
SENSOR (VSS) (ON LEFT REAR SIDE OF TRANSMISSION)
(ON TRANSFER CASE
TAILSHAFT HOUSING)
372185
Fig 2: 5.3L VIN 7, A/T Circuit (2 of 2)
AUTOMATIC TRANSMISSION

PRESSURE
CONTROL (PC) AUTOMATIC
J116 SOLENOID TRANSMISSION
INPUT
VALVE FLUID
SHAFT
TEMPERATURE

RED

RED

RED

RED
SPEED
(TFT) SENSOR

RED
SENSOR

B
(ISS)
TORQUE 1-2 TORQUE

A
CONVERTER SHIFT CONVERTER 2-3
CLUTCH (TCC) SOLENOID CLUTCH
SHIFT

B
A
PULSE WIDTH (SS) VALVE (TCC)
SOLENOID
MODULATION SOLENOID

LT BLU
PPL
(SS)

B
A
(PWM) VALVE

B
B

VALVE

GRY
BRN
SOLENOID

B
TAN

BLK
LT GRN

RED
VALVE

YEL
BLK A

GRN C
DK
U

E
K

D
C

M
L
X175
LT GRN

LT BLU
BRN

TAN/BLK

ORG

YEL/BLK

PNK/WHT

LT BLU/WHT
ORG/BLK

TAN
YEL/BLK
BRN
1
LT GRN
2
ORG
3

ORG/BLK
4

PNK/WHT
5

LT BLU/WHT
6

YEL/BLK
7

TAN/BLK
8

TAN
9

YEL/BLK
10

COMPUTER
ORG/BLK DATA LINES
11 SYSTEM

G201
(UPPER LEFT
LT BLU
2500
6399

2501

CORNER OF

BLK/WHT
419

12
ORG/BLK 1786 DASH)
13
ORG/BLK
BRN/WHT
ORG/BLK

TAN/BLK
X109

J230
2500
2501

553
A7

TAN

BLK/WHT
TAN/BLK

LT BLU
BRN/WHT

LT BLU
DK GRN

TAN

EXCEPT
27
68

28
X1
1

71

4.3L
1

2
X3

X1
23
8
9
57

54

44
27

43
X1

4.3L
18
6

HI SPD GMLAN +
HI SPD GMLAN -

TOW/HAUL SW SIG

INSTRUMENT ENGINE CONTROL

NCA

NCA
PARK/NEUTRAL SIG
MIL IND CTRL
REPLICATED TOS SIG

HI SPD GMLAN +
HI SPD GMLAN -

PANEL MODULE (ECM)

TOW/ MIL CLUSTER (IPC) (LEFT FRONT
HAUL IND OF ENGINE
IND COMPT, NEAR TOW/HAUL
FAN SHROUD) SWITCH
LO GM
GMLAN
PRND321

MIL SIG

BODY CONTROL AUTOMATIC

MODULE (BCM) TRANSMISSION
LOGIC (LOWER LEFT SHIFT LEVER
372186 SIDE OF DASH)
Fig 3: 5.3L VIN 7, Transfer Case Circuit, 2-Speed Manual

HOT W/ RUN/CRNK
RELAY ENERGIZED
UNDERHOOD
FUSE BLOCK
AUX HVAC-IGN TRANS IGN 1 (LEFT SIDE
FUSE 48 (GAS) FUSE 19 (GAS) OF ENGINE
FUSE 45 (DIESEL) FUSE 13 (DIESEL) COMPT)
10A 10A

G4 X5 N4 X2
PNK

PNK
J220
PNK (W/ STEERING
WHEEL HEATER)
5
J130
INSTRUMENT 4WD IND (6.0L (VIN G)
PANEL CLUSTER
(IPC)

PNK
IGN
LOGIC SER GRY/BLK B
GND DATA

13 6 BLK A
(LOWER
LEFT SIDE
BLK/WHT

DK GRN
OF DASH)
GRY/BLK C
LEFT I/P
JUNCTION BLOCK
TRANSFER CASE
BLK/WHT K2 H1
SHIFT CONTROL SWITCH
X1 X1
(ON TOP LEFT OF
G201
BLK/ COMPUTER TRANSFER CASE)
(UPPER
WHT DATA LINES
LEFT CORNER
OF DASH) SYSTEM
GROUND
DISTRIBUTION
SYSTEM
6.0L
(VIN G)
4.8L, 5.3L,
6.0L (VIN J)
4.3L 6.6L
GRY/BLK

& 6.2L
PNK

GMLAN BUS +
43 66 29 28 TAN/BLK LOGIC M
2500 B C X110
44 46 43 27 TAN
GMLAN BUS -
2501
26 11 4 2 GRY/BLK PNK C
4WD LOW SIG
1694 GRY/BLK B
72 10 5 3 TAN/WHT A TAN/WHT A
AXLE SW SIG
X1 X1 X1 X1 1695 BLK D BLK E
J105
X110
ENGINE CONTROL
MODULE (ECM) FRONT AXLE ACTUATOR
(EXCEPT HYBRID: LEFT (ON FRONT
BLK AXLE ASSEMBLY)
FRONT OF ENGINE (TOP LEFT
COMPT, NEAR REAR OF ENGINE)
G107 (4.3L)
FAN SHROUD)
(HYBRID: LEFT FRONT
OF ENGINE COMPT) (6.6L) G102 (4.8L, 5.3L, 6.OL & 6.2L)
G103
(ON
(ON LOWER
FRONT OFLEFT
372187 FRONT
RIGHT OF ENGINE)
CYLINDER HEAD)
Fig 4: 5.3L VIN 7, Transfer Case Circuit, 2-Speed W/ Push Button Control
HOT W/ RUN/CRNK HOT W/ RUN/CRNK HOT AT HOT W/ RUN/CRNK
RELAY ENERGIZED RELAY ENERGIZED ALL TIMES RELAY ENERGIZED
UNDERHOOD BODY WINDSHIELD
FUSE BLOCK AUX HVAC-IGN MISC IGN TREC TRANS IG1 CONTROL OUTSIDE
(LEFT SIDE FUSE 48 1 FUSE 43 1 FUSE 67 1 FUSE 19 1 MODULE MOISTURE
OF ENGINE FUSE 45 2 FUSE 40 2 FUSE 62 2 FUSE 13 2 (LOWER LEFT SENSOR
COMPT) 10A 10A 30A 15A ACCY WAKEUP SIDE OF (NEAR INSIDE
SRL DATA IGN DASH) IGN REARVIEW
G4 G3 F1 X5 N4 X2 MIRROR MOUNT)
19 X4

14
X5

4
POWER

PNK
PNK

DK BLU
PNK

RED/BLK

PNK

WHT

WHT
DISTRIBUTION

5985

2283
RED/BLK
1 GAS SYSTEM
2 J220
DIESEL A4 X1
(W/ STEERING
J130

PNK
WHEEL HEATER) LEFT I/P
JUNCTION

PNK
BLOCK
WHT A4 RIGHT
X1 (LOWER
A3 LEFT X2 I/P
5
SIDE OF JUNCTION

PNK
INSTRUMENT WHT 2A4 BLOCK
4WD IND DASH) COMPUTER DATA

PNK
CLUSTER PANEL WHT (IN RIGHT
(IPC) LINES SYSTEM
END OF
DASH)
IGN POWER
SER
GND LOGIC DATA DISTRIBUTION
SYSTEM

(LOWER 13 6
LEFT SIDE
BLK/WHT

DK GRN

OF DASH)
LEFT I/P
JUNCTION BLOCK
BLK/WHT K2 H1
X1 X1 WHT 2
G201 COMPUTER DATA
BLK/WHT

(UPPER LINES SYSTEM

LEFT CORNER INTERIOR PPL/WHT 4
OF DASH) GROUND LIGHTS
DISTRIBUTION SYSTEM
SYSTEM
PPL/WHT 10
1
2 GRY 6029 4-LO IND
5 VOLT REF
3 DK BLU/WHT 7473 TAN/BLK 9
INCRMT ENCODER IMPULSE SIG
4 ORG/WHT 7477
5 VOLT REF
5 BRN 1560 4-HI IND
NEUTRAL IND CTRL
6 LT GRN/BLK 1563 LT GRN/BLK 8
2 HI IND CTRL
7 TAN 1569
LOCK SOL CTRL
8 2-HI IND

9 WHT/GRN 7475 PNK 7

8V SPLY
10 PPL 7476
LO REF
11 LT BLU 1693 AUTO 4WD
SW SIG
12 TAN/BLK 1566
4 HI IND CTRL
13 PPL/WHT 1565 BRN 3
4 LO IND CTRL
14 PNK 1561
AWD IND CTRL
15 GRY/BLK 1570 NEUTRAL IND
AXLE ACTR CTRL
16 LT BLU 12
X1
1
2 GRY 11
3 TAN/WHT 1695
AXLE SW SIG
4 TAN 2501 TAN
GMLAN BUS -
5 TAN/BLK 2500 TAN/BLK TRANSFER CASE
GMLAN BUS + SHIFT CONTROL SWITCH
6 PNK 239 DK BLU
IGN 1 VOLT (ON TOP LEFT OF
7 TRANSFER CASE)
TAN/WHT
GRY/BLK
8
9 YEL/BLK 7478 COMPUTER
LOW REF DATA LINES
10 DK BLU 5985
SYSTEM
X109

ACCY WAKEUP SRL DATA

LT GRN 7479
C7
C8

11
ROTARY POSITION SENS SIG
12 TAN 2501 TAN
GMLAN BUS-
13 TAN/BLK 2500 TAN/BLK
GMLAN BUS +
14 YEL 7474
INCRMT ENCODER DIRECTN SIG J113
15
(IN I/P HARNESS,
DK BLU/WHT

16 IN X103 BREAKOUT
WHT/GRN

RED/BLK

X2 7 CM FROM MAIN
HARNESS ASSEMBLY)
TAN

ORG 1553 ORG

PPL

A
YEL

MTR CTRL B
B TAN 1552 TAN
A TAN/WHT
B GRY/BLK

MTR CTRL A
C RED/BLK 1342
BATT +
C PNK

D BLK 550 BLK

X110

GND
X3 J105
D
A5
B6

C10
A2

A4
B12
B9

C6

X109

TRANSFER CASE
SHIFT CONTROL MODULE
A TAN/WHT
B GRY/BLK

(LOWER LEFT SIDE OF DASH)

C PNK
E BLK
(OR DK BLU/WHT)
E LT GRN/DK BLU

FRONT AXLE
G WHT/GRN

B RED/BLK

C LT GRN C11 LT GRN ACTUATOR

(ON FRONT
D ORG
A TAN

C TAN

LOGIC
H PPL
F YEL

AXLE
A YEL/BLK B11 YEL/BLK ASSEMBLY)
B ORG/WHT A1 ORG/WHT TRANSFER
X109 CASE
TRANSFER CASE ENCODER
BLK

PULSE SIG
DIRTN SIG

8V SPLY
LOW REF

2/4 WHEEL DRIVE MOTOR M M

ACTUATOR POSITION
(4.8L, 5.3L, 6.0L & 6.2L) G102 G107 (4.3L)
SENSOR
(ON LOWER (TOP LEFT
(ON TRANSFER CASE) BRAKE
LEFT FRONT REAR SHIFT
OF ENGINE) OF ENGINE) MOTOR LOGIC CONTROL
372194