2006 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connector End View C1

Fig 1: Powertrain Control Module (PCM) C1 Connector End Views
GM1567532Courtesy of GENERAL MOTORS CORP.
Powertrain Control Module (PCM) C1 Connector Parts Information

Connector Part Information 
  • OEM: 15487350
  • Service: See Catalog
  • Description: 56-Way F Micro 64 Series Sealed (BU)
Terminal Part Information 
  • Pins:
  • Terminal:
  • Core/Insulation Crimp:
  • Release Tool/Test Probe:
Powertrain Control Module (PCM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1-2 - - Not Used
3 GY/BK 1694 4WD Low Signal
4-5 - - Not Used
6 D-GN/WH 459 A/C Compressor Clutch Relay Control
7 BN 1271 Low Reference
8 PU 1272 Low Reference
9-11 - - Not Used
12 PU 1589 Fuel Level Sensor Signal
13 PK 739 Ignition 1 Voltage
14 - - Not Used
15 PU 1807 Class 2 Serial Data
16 - - Not Used
17 GY 2700 5-Volt Reference
18 BN 4 Accessory Voltage
19 PK 639 Ignition 1 Voltage
20 OG 440 Battery Positive Voltage
21 D-GN/WH 817 Vehicle Speed Signal
22 WH 1310 EVAP Canister Vent Solenoid Control
23 - - Not Used
24 D-GN 890 Fuel Tank Pressure Sensor Signal
25 - - Not Used
26 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
27 D-BU 1161 APP Sensor 1 Signal
28 - - Not Used
29 BK 2759 Low Reference
30 WH/BK 1164 5-Volt Reference
31 - - Not Used
32 L-BU 20 Stop Lamp Supply Voltage
33-36 - - Not Used
37 D-GN/WH 465 Fuel Pump Relay Control
38 WH/BK 448 Powertrain Diagnostic Enable
39 - - Not Used
40 BN/WH 419 MIL Control
41 L-BU 1162 APP Sensor 2 Signal
42 - - Not Used
43 TN 1274 5-Volt Reference
44 GY 1884 Cruise Control Switch Signal
45 - - Not Used
46 PU 420 TCC Brake Switch/Cruise Control Release Signal
47 GY 2709 5-Volt Reference
48 YE/BK 625 Starter Enable Relay Control
49-52 - - Not Used
53 BN/WH 379 CPP Switch Signal
54 D-GN 1433 PNP/Clutch Start Switch Signal
56 BK 2751 Low Reference
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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