Document ID: 5241357

K20 Engine Control Module X1 (LTG)

Connector Part Information Harness Type:Engine OEM Connector:34566-0303 Service Connector:13574782 Description:73-Way F 0.64, 2.8 Series, Sealed(BK with BU Terminal Position Assurance) Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool I 13587518 J-35616-4A (PU) J-38125-11A II 19354746 J-35616-64B (L-BU) J-38125-213 K20 Engine Control Module X1 (LTG) Pin Size Color Circuit Function Terminal Type ID Option 1 - 4 — — — Not Occupied — — 5 0.5 BU/BN 4498 High Speed GMLAN Serial Data [+] 7 II (LTG/LYX)-NUG 6 0.5 WH 4499 High Speed GMLAN Serial Data [-] 7 II (LTG/LYX)-NUG 7 0.5 WH 7494 High Speed GMLAN Serial Data [-] 3 II — 8 0.5 BU/BK 7493 High Speed GMLAN Serial Data [+] 3 II — 9 0.5 BU 2500 High Speed GMLAN Serial Data [+] 1 II LTG+(M3H/M3D) 10 0.5 WH 2501 High Speed GMLAN Serial Data [-] 1 II LTG+(M3H/M3D) 11 0.5 BN/RD 1274 Accelerator Pedal Position 5V Reference 2 II LTG 12 0.5 WH/RD 1164 Accelerator Pedal Position 5V Reference 1 II LTG 13 0.5 VT/YE 5985 Accessory Wake-Up Serial Data II LTG+MM1 14 0.5 VT/GN 439 Run/Crank Ignition 1 Voltage II LTG+MM1 15 0.5 RD/WH 140 Battery Positive Voltage II LTG 16 0.5 VT 5292 Powertrain Main Relay Fused Supply Voltage 3 II LTG 17 0.5 YE 5530 Hood Open Switch Signal II KL9+LTG 18 0.5 GY/RD 3053 Turbocharger Intake Pressure Sensor High Reference Bank 1 II LTG 19 - 22 — — — Not Occupied — — 23 0.5 BK/GY 3927 Transmission Internal Mode Switch Feedback Signal II LTG+M3D 24 — — — Not Occupied — — 25 0.5 BK/YE 5382 Brake Position Sensor Low Reference II LTG+MM1 26 — — — Not Occupied — — 27 0.5 BK/VT 1272 Accelerator Pedal Position Low Reference 2 II LTG 28 0.5 BK/BU 1271 Accelerator Pedal Position Low Reference 1 II LTG 29 - 31 — — — Not Occupied — — 32 0.5 YE/VT 6030 Brake Vacuum Sensor Signal II KL9+LTG 33 0.5 GN/WH 1162 Accelerator Pedal Position Signal 2 II LTG 34 0.5 GN/WH 492 Mass Air Flow Sensor Signal II LTG 35 - 36 — — — Not Occupied — — 37 0.5 BN/RD 2700 Air Conditioning Pressure Sensor 5V Reference II LTG 38 0.5 GY 4109 Driver Mode Switch 5V Reference II LTG+(F48/EPH) 39 0.5 YE/BU 4171 Transmission Input Shaft Speed Sensor Circuit 9V Reference II LTG+M3D 40 — — — Not Occupied — — 41 0.5 WH/RD 5381 Brake Position Sensor 5V Reference II LTG+MM1 42 - 43 — — — Not Occupied — — 44 0.5 YE/BK 625 Starter Enable Relay Control II KL9+LTG 45 0.5 YE/WH 1161 Accelerator Pedal Position Signal 1 II LTG 46 — — — Not Occupied — — 47 0.5 BU/GY 636 Ambient Air Temperature Sensor Signal II LTG 48 0.5 WH/BU 6289 Intake Air Temperature Sensor Signal II LTG 49 — — — Not Occupied — — 50 0.5 WH/BU 6311 Cruise/ETC/TCC Brake Signal II LTG 51 0.5 VT/BU 5291 Powertrain Main Relay Fused Supply Voltage 2 II LTG 52 - 53 — — — Not Occupied — — 54 0.5 WH/GY 459 Air Conditioning Compressor Clutch Relay Control II LTG 55 - 56 — — — Not Occupied — — 57 0.5 GN 380 Air Conditioning Refrigerant Pressure Sensor Signal II LTG 58 0.5 WH/VT 4108 Driver Mode Switch Signal II LTG+(F48/EPH) 59 0.5 WH/BU 5726 Ignition Mode Switch Mode Control Backup II LTG+M3D 60 0.5 BN/GY 4008 Humidity Sensor Signal II LTG 61 0.5 WH/GN 5380 Brake Position Sensor Signal II LTG+MM1 62 - 63 — — — Not Occupied — — 64 0.5 GN/GY 465 Fuel Pump Primary Relay Control II LTG 65 — — — Not Occupied — — 66 0.5 GY 5127 Turbocharger Coolant Pump Relay Control II LTG+(MAH/MBC/MCX) 67 0.5 YE 5991 Powertrain Relay Coil Control II LTG 68 - 69 — — — Not Occupied — — 70 0.5 YE/VT 4325 Starter Pinion Solenoid Actuator Relay Control II KL9+LTG 71 0.5 BN/WH 419 Check Engine Indicator Control II LTG+(NTB/NUB) 72 — — — Not Occupied — — 73 2 VT/BU 5290 Powertrain Main Relay Fused Supply Voltage 1 I LTG

Terminal Type ID	Terminated Lead	Diagnostic Test Probe	Terminal Removal Tool
I	13587518	J-35616-4A (PU)	J-38125-11A
II	19354746	J-35616-64B (L-BU)	J-38125-213

Pin	Size	Color	Circuit	Function	Terminal Type ID	Option
1 - 4	—	—	—	Not Occupied	—	—
5	0.5	BU/BN	4498	High Speed GMLAN Serial Data [+] 7	II	(LTG/LYX)-NUG
6	0.5	WH	4499	High Speed GMLAN Serial Data [-] 7	II	(LTG/LYX)-NUG
7	0.5	WH	7494	High Speed GMLAN Serial Data [-] 3	II	—
8	0.5	BU/BK	7493	High Speed GMLAN Serial Data [+] 3	II	—
9	0.5	BU	2500	High Speed GMLAN Serial Data [+] 1	II	LTG+(M3H/M3D)
10	0.5	WH	2501	High Speed GMLAN Serial Data [-] 1	II	LTG+(M3H/M3D)
11	0.5	BN/RD	1274	Accelerator Pedal Position 5V Reference 2	II	LTG
12	0.5	WH/RD	1164	Accelerator Pedal Position 5V Reference 1	II	LTG
13	0.5	VT/YE	5985	Accessory Wake-Up Serial Data	II	LTG+MM1
14	0.5	VT/GN	439	Run/Crank Ignition 1 Voltage	II	LTG+MM1
15	0.5	RD/WH	140	Battery Positive Voltage	II	LTG
16	0.5	VT	5292	Powertrain Main Relay Fused Supply Voltage 3	II	LTG
17	0.5	YE	5530	Hood Open Switch Signal	II	KL9+LTG
18	0.5	GY/RD	3053	Turbocharger Intake Pressure Sensor High Reference Bank 1	II	LTG
19 - 22	—	—	—	Not Occupied	—	—
23	0.5	BK/GY	3927	Transmission Internal Mode Switch Feedback Signal	II	LTG+M3D
24	—	—	—	Not Occupied	—	—
25	0.5	BK/YE	5382	Brake Position Sensor Low Reference	II	LTG+MM1
26	—	—	—	Not Occupied	—	—
27	0.5	BK/VT	1272	Accelerator Pedal Position Low Reference 2	II	LTG
28	0.5	BK/BU	1271	Accelerator Pedal Position Low Reference 1	II	LTG
29 - 31	—	—	—	Not Occupied	—	—
32	0.5	YE/VT	6030	Brake Vacuum Sensor Signal	II	KL9+LTG
33	0.5	GN/WH	1162	Accelerator Pedal Position Signal 2	II	LTG
34	0.5	GN/WH	492	Mass Air Flow Sensor Signal	II	LTG
35 - 36	—	—	—	Not Occupied	—	—
37	0.5	BN/RD	2700	Air Conditioning Pressure Sensor 5V Reference	II	LTG
38	0.5	GY	4109	Driver Mode Switch 5V Reference	II	LTG+(F48/EPH)
39	0.5	YE/BU	4171	Transmission Input Shaft Speed Sensor Circuit 9V Reference	II	LTG+M3D
40	—	—	—	Not Occupied	—	—
41	0.5	WH/RD	5381	Brake Position Sensor 5V Reference	II	LTG+MM1
42 - 43	—	—	—	Not Occupied	—	—
44	0.5	YE/BK	625	Starter Enable Relay Control	II	KL9+LTG
45	0.5	YE/WH	1161	Accelerator Pedal Position Signal 1	II	LTG
46	—	—	—	Not Occupied	—	—
47	0.5	BU/GY	636	Ambient Air Temperature Sensor Signal	II	LTG
48	0.5	WH/BU	6289	Intake Air Temperature Sensor Signal	II	LTG
49	—	—	—	Not Occupied	—	—
50	0.5	WH/BU	6311	Cruise/ETC/TCC Brake Signal	II	LTG
51	0.5	VT/BU	5291	Powertrain Main Relay Fused Supply Voltage 2	II	LTG
52 - 53	—	—	—	Not Occupied	—	—
54	0.5	WH/GY	459	Air Conditioning Compressor Clutch Relay Control	II	LTG
55 - 56	—	—	—	Not Occupied	—	—
57	0.5	GN	380	Air Conditioning Refrigerant Pressure Sensor Signal	II	LTG
58	0.5	WH/VT	4108	Driver Mode Switch Signal	II	LTG+(F48/EPH)
59	0.5	WH/BU	5726	Ignition Mode Switch Mode Control Backup	II	LTG+M3D
60	0.5	BN/GY	4008	Humidity Sensor Signal	II	LTG
61	0.5	WH/GN	5380	Brake Position Sensor Signal	II	LTG+MM1
62 - 63	—	—	—	Not Occupied	—	—
64	0.5	GN/GY	465	Fuel Pump Primary Relay Control	II	LTG
65	—	—	—	Not Occupied	—	—
66	0.5	GY	5127	Turbocharger Coolant Pump Relay Control	II	LTG+(MAH/MBC/MCX)
67	0.5	YE	5991	Powertrain Relay Coil Control	II	LTG
68 - 69	—	—	—	Not Occupied	—	—
70	0.5	YE/VT	4325	Starter Pinion Solenoid Actuator Relay Control	II	KL9+LTG
71	0.5	BN/WH	419	Check Engine Indicator Control	II	LTG+(NTB/NUB)
72	—	—	—	Not Occupied	—	—
73	2	VT/BU	5290	Powertrain Main Relay Fused Supply Voltage 1	I	LTG


Connector Part Information Harness Type:Engine OEM Connector:34566-0303 Service Connector:13574782 Description:73-Way F 0.64, 2.8 Series, Sealed(BK with BU Terminal Position Assurance)