Automatic Transmission Inline 20-Way Connector

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

AT Inline 20-Way Connector End View, Engine Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191511 20-Way F Micro-Pack 100W Series (Gray)
Pin	Wire Color	Circuit No.	Function
A	L-GN	1222	1-2 Shift Solenoid Valve Control
B	YE/BK	1223	2-3 Shift Solenoid Valve Control
C	RD/BK	1228	Pressure Control (PC) Solenoid Valve High Control
D	L-BU/WH	1229	PC Solenoid Valve Low Control
E	PK	1020	Ignition 0 Voltage
F-K	-	-	Not Used
L	YE/BK	1227	Transmission Fluid Temperature (TFT) Sensor Signal
M	BK	2762	Low Reference
N	PK	1224	TFP Switch Signal A
P	RD	1226	TFP Switch Signal C
R	D-BU	1225	TFP Switch Signal B
S	WH	687	3-2 Shift Solenoid Valve Control
T	TN/BK	422	Torque Converter Clutch Solenoid Valve Control
U	BN	418	Torque Converter Clutch Pulse Width Modulation Solenoid Valve Control
V-W	-	-	Not Used

AT Inline 20-Way Connector End View, Transmission Side

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12160782 20-Way M Micro-Pack 100W Series, GRY
Pin	Wire Color	Circuit No.	Function
A	L-GN	1222	1-2 Shift Solenoid Valve Control
B	YE	1223	2-3 Shift Solenoid Valve Control
C	PU	1228	Pressure Control (PC) Solenoid Valve High Control
D	L-BU	1229	PC Solenoid Valve Low Control
E	RD	839	Ignition 1 Voltage
F-K	-	-	Not Used
L	BN	1227	Transmission Fluid Temperature (TFT) Sensor Signal
M	GY	452	Low Reference
N	PK	1224	TFP Switch Signal A
P	OG	1226	TFP Switch Signal C
R	D-BU	1225	TFP Switch Signal B
S	WH	687	3-2 Shift Solenoid Valve Control
T	BK	422	Torque Converter Clutch Solenoid Valve Control
U	TN	418	Torque Converter Clutch Pulse Width Modulation Solenoid Valve Control
V-W	-	-	Not Used