Back View of PCM Connector End View C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WH
Pin	Wire Color	Function
1-2	-	Not Used
3	BK	Engine Speed Output
4	BK/WH	EFI Relay High Control
5	YE/BK	AC Compressor Clutch Relay Control
6-7	-	Not Used
8	BU/WH	Crusie Control Idle
9-13	-	Not Used
14	YE/RD	Engine Coolant Temperature Gage Output
15	BU/RD	Serial Data
16	GN/RD	Circuit Opening Relay Control
17	PU/WH	Vehicle Speed Sensor (VSS) Input
18	-	Not Used
19	GN/WH	Brake Switch Signal
20-22	-	Not Used
23	WH	Heated Oxygen Sensor (HO2S) 2 Input
24-30	-	Not Used
31	BK/WH	Rocker Arm Oil Pressure Switch Input
32	BK/BU	Evaporator Temperature Sensor Input
33	GN/WH	AC On Signal
34	GN	Secondary AIR Pressure Sensor Input
35	-	Not Used