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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2074 (Wiring Systems And Power Management - Component Connector End Views Part 2) >> Engine Control Module (ECM) X1 (LY6)
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Engine Control Module (ECM) X1 (LY6)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X1 (LY6) Connector End View
GM1673472Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LY6)

Pin Wire Circuit Function
1 0.35 OG/BK 1786 Park/Neutral Signal
2 0.5 GY/BK 1694 4WD Low Signal (NQG)
3 0.5 TN/WH 1695 Axle Switch Signal (NQG)
4-8 - - Not Used
9 0.5 L-BU/WH 6311 Brake Switch Signal
10 0.5 PU/WH 1668 HO2S High Signal Bank 1 Sensor 2
11 0.5 TN/WH 1669 HO2S Low Signal Bank 1 Sensor 2
12 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (CJ2/C67)
13 0.35 TN 5514 Low Reference (4.8L/5.3L6.0L/6.2L with CJ2/C67)
14-15 - - Not Used
16 0.35 PU 1589 Fuel Level Sensor Signal - Primary
17 - - Not Used
18 0.5 D-BU 5985 Accessory Wakeup Serial Data
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21-22 - - Not Used
23 0.35 PU 1272 Low Reference
24 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
25-26 - - Not Used
27 0.5 TN/BK 2501 High Speed GMLAN Serial Data Bus (-)
28 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
29 0.35 D-BU 1161 APP Sensor 1 Signal
30 0.35 BN 1271 Low Reference
31 0.35 TN/BK 6049 Low Reference
32 0.35 L-BU 1162 APP Sensor 2 Signal
33 0.35 GY 2709 5-Volt Reference 1
34 0.35 GY/WH 2700 5-Volt Reference 1
35 0.5 TN 2760 Low Reference
36 0.35 TN 1274 5-Volt Reference 1
37 0.5 TN/BK 472 IAT Sensor Signal
38 0.5 TN 2760 Low Reference
39-40 - - Not Used
41 0.5 YE 492 MAF Sensor Signal
42-46 - - Not Used
47 0.5 PK/BK 1339 Ignition 1 Voltage
48 - - Not Used
49 0.5 TN 1671 JO2S Low Signal Bank 2 Sensor 2
50 0.35 D-GN/WH 465 Fuel Pump Relay Control - Primary
51 0.35 TN 1465 Fuel Pump Relay Control - Secondary
52 0.5 YE/BK 625 Starter Enable Relay Control
53-55 - - Not Used
56 0.35 WH/BK 1164 5-Volt Reference 2
57 0.35 YE/BK 1827 Vehicle Speed Signal
58 - - Not Used
59 0.35 YE 5991 Powertrain Relay Coil Control
60 - - Not Used
61 0.5 WH 1310 EVAP Canister Vent Solenoid Control
62 - - Not Used
63 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control (CJ2/C67)
64 0.5 OG/WH 3223 HO2S Heater Low Control Bank 2 Sensor 2
65 0.5 GY/WH 3122 HO2S Heater Low Control Bank 2 Sensor 1
66-67 - - Not Used
68 0.35 BN/WH 419 MIL Control
69 0.5 PU 1970 HO2S High Signal Bank 2 Sensor 2
70 0.35 L-BU 1937 Secondary Fuel Level Sensor Signal
71 0.35 OG/BK 6399 Replicated TOS Signal (without 31 Series without NQF/NQG)
0.5 PU/WH 821 VSS High Signal (NQF/NQG)
72 0.5 L-GN/BK 822 VSS Low Signal (NQF/NQG)
73 3 BK/WH 451 Ground
Connector Part Information 
  • OEM: 13580788
  • Service: See Catalog
  • Description: 73-Way F MX123 34566 Series (BK)

Terminal Part Information 
  • Pins: 1, 12, 13, 16, 23, 24, 29-34, 36, 50, 51, 56, 57, 59, 63, 68, 70, 71
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 2, 3, 9-11, 18-20, 27, 28, 37, 38, 41, 47, 49, 52, 61, 64, 56, 59, 71, 72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pin: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)
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