Engine Control Module (ECM) X1

Fig 1: Engine Control Module (ECM) X1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	-	-	Not Used
2	0.35 PU	420	Cruise Control Release Signal (K34)
3	-	-	Not Used
4	0.35 D-GN/WH	1559	4WD Low Signal (4WD)
5-6	-	-	Not Used
7	0.8 L-BU	20	Stop Lamp Control
8	-	-	Not Used
9	0.35 BK	2759	Low Reference
10-11	-	-	Not Used
12	0.35 BN/WH	419	MIL Control
13	0.35 D-GN/WH	465	Fuel Pump Relay Control
14	-	-	Not Used
15	0.35 PU	1807	Class 2 Serial Data
16	0.35 PU	1807	Class 2 Serial Data
17	-	-	Not Used
18	0.5 BN	4	Ignition Voltage
19	0.35 PK	639	Ignition Voltage
20	0.35 OG	440	Battery Positive Voltage
21	0.35 YE/BK	1827	Vehicle Speed Signal
22-25	-	-	Not Used
26	0.35 YE/BK	625	Starter Enable Relay Control
27-28	-	-	Not Used
29	0.35 GY	1884	Cruise Control Switch Signal (K34)
30-32	-	-	Not Used
33	0.35 WH/BK	1164	5-Volt Reference
34	0.35 GY	2709	5-Volt Reference
35	0.35 TN	1274	5-Volt Reference
36	0.35 BN	1271	Low Reference
37	0.35 PU	1272	Low Reference
38-39	-	-	Not Used
40	0.35 YE	5991	Powertrain Relay Control
41-43	-	-	Not Used
44	0.35 PU	1589	Fuel Level Sensor Signal
45-46	-	-	Not Used
47	0.35 D-BU	1161	APP Sensor 1 Signal
48	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
49	0.35 L-BU	1162	APP Sensor 2 Signal
50	-	-	Not Used
51	0.35 PU	421	AIR Solenoid Relay Control (K18)
52	-	-	Not Used
53	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
54	-	-	Not Used
55	0.5 WH	1310	EVAP Canister Vent Solenoid Control
56-73	-	-	Not Used

Connector Part Information

Terminal Part Information