Automatic Transmission Inline 20-Way Connector End View

Engine Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15305238 20-Way F Micro-Pack 100W Series, Sealed (GRY)
Pin	Wire Color	Circuit No.	Function
A	LT GRN	1222	1-2 Shift Solenoid Valve Control
B	YEL/BLK	1223	2-3 Shift Solenoid Valve Control
C	RED/BLK	1228	PC Solenoid Valve High Control
D	LT BLU/WHT	1229	PC Solenoid Valve Low Control
E	PNK	739	Ignition 1 Voltage
F	BLK/WHT	771	Transmission Range Switch Signal A
G	YEL	772	Transmission Range Switch Signal B
H	GRY	773	Transmission Range Switch Signal C
J	WHT	776	Transmission Range Switch Signal P
K	BLK/WHT	1550	Ground
L	YEL/BLK	1227	TFT Sensor Signal
M	BLK	2762	Low Reference
N	PNK	1224	Transmission Fluid Pressure Switch Signal A
P	RED	1226	Transmission Fluid Pressure Switch Signal C
R	-	-	Not Used
S	RED/BLK	1230	AT ISS High Signal
T	TAN/BLK	422	TCC Solenoid Valve Control
U	PNK	739	Ignition 1 Voltage
V	DK BLU/WHT	1231	AT ISS Low Signal
W	-	-	Not Used

Transmission Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15317834 20-Way M Micro-Pack 100W Series, Lock Assist/Sealed (GRY)
Pin	Wire Color	Circuit No.	Function
A	LT GRN	1222	1-2 Shift Solenoid Valve Control
B	YEL	1223	2-3 Shift Solenoid Valve Control
C	PPL	1228	PC Solenoid Valve High Control
D	LT BLU	1229	PC Solenoid Valve Low Control
E	RED	839	Ignition 1 Voltage
F	RED/BLK	771	Transmission Range Switch Signal A
G	DK GRN/WHT	772	Transmission Range Switch Signal B
H	YEL/BLK	773	Transmission Range Switch Signal C
J	GRY/WHT	776	Transmission Range Switch Signal P
K	BLK/WHT	1050	Ground
L	BRN	1227	TFT Sensor Signal
M	GRY	452	Low Reference
N-R	-	-	Not Used
S	BLK	1230	AT ISS High Signal
T	TAN	418	TCC Solenoid Valve Control
U	WHT	1135	Ignition 1 Voltage
V	DK GRN	1231	AT ISS Low Signal
W	-	-	Not Used