Automatic Transmission Inline 20-Way Connector End View (M33 Only)

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

AT Inline 20-Way Connector, Engine Side (M33 Only)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12160493 Engine Harness Side 20-Way F Micro-Pack 100 W Series (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	1020	OFF/ON/START Voltage
F	PPL	5538	Ignition 1 Voltage
G	PPL	5538	Ignition 1 Voltage
H	BLK	550	Ground
J	BLK	550	Ground
K	-	-	Not Used
L	YEL/BLK	1227	TFT Sensor Signal
M	GRY	720	Low Reference
N	PNK	1224	Transmission Fluid Pressure Switch Signal A
P	RED	1226	Transmission Fluid Pressure Switch Signal C
R	DK BLU	1225	Transmission Fluid Pressure Switch Signal B
S	WHT	687	3-2 Shift Solenoid Valve Control
T	TAN/BLK	422	TCC Solenoid Valve Control
U	BRN	418	TCC PWM Solenoid Valve Control
V-W	-	-	Not Used

AT Inline 20-Way Connector, Transmission Side (M33 Only)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12160782 Transmission Harness Side 20-Way M Micro-Pack 100 W Series (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	PNK	739	Ignition 1 Voltage
G	PNK	739	Ignition 1 Voltage
H	GRY	5259	Ground
J	GRY	5259	Ground
K	-	-	Not Used
L	BRN	1227	TFT Sensor Signal
M	GRY	452	Low Reference
N	PNK	1224	Transmission Fluid Pressure Switch Signal A
P	ORN	1226	Transmission Fluid Pressure Switch Signal C
R	DK BLU	1225	Transmission Fluid Pressure Switch Signal B
S	WHT	687	3-2 Shift Solenoid Valve Control
T	BLK	422	TCC Solenoid Valve Control
U	TAN	418	TCC PWM Solenoid Valve Control
V-W	-	-	Not Used