2007 Pontiac Grand Prix BaseFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connector End View C1 (NU6)

Fig 1: PCM C1 Connector End View (NU6)
GM1228485Courtesy of GENERAL MOTORS CORP.
PCM C1 Connector Part Information (NU6)

Connector Part Information 
  • OEM: 15460473
  • Service: 88953346
  • Description: 56-Way F Micro-Pack/064 Series (BU)
Terminal Part Information 
  • Pins: 4, 6- 8, 10, 12, 15, 18-24, 26, 31-34, 37, 43, 44, 48, 50, 53
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
PCM C1 Connector Terminal Identification (NU6)

Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 GY 2700 5-Volt Reference 2
5 - - Not Used
6 BN/WH 419 MIL Control
7 BK 2751 Low Reference
8 BK 2759 Low Reference
9 - - Not Used
10 WH 1310 EVAP Canister Vent Solenoid Control
11 - - Not Used
12 BK 476 Low Reference
13-14 - - Not Used
15 D-GN 1049 PCM Class 2 Serial Data
16-17 - - Not Used
18 BN 1141 Ignition 3 Voltage
19 PK 439 Ignition 1 Voltage
20 OG 540 Battery Positive Voltage
21 WH 121 Engine Speed Signal (ABS)
22 D-GN 389 Vehicle Speed Signal
23 YE/BK 625 Starter Enable Relay Control
24 BN 5069 Powertrain Relay Control
25 - - Not Used
26 D-GN 890 Fuel Tank Pressure Sensor Signal
27-30 - - Not Used
31 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
32 WH 17 Stop Lamp Switch Signal
33 D-GN/WH 459 A/C Compressor Clutch Relay Control
34 BN 436 Air Pump Relay Control
35-36 - - Not Used
37 D-GN/WH 465 Fuel Pump Relay Control
38-42 - - Not Used
43 PU 1589 Fuel Level Sensor Signal
44 GY 1884 Cruise Control Switch Signal
45-47 - - Not Used
48 D-GN 335 Low Speed Cooling Fan Relay Control
49 - - Not Used
50 D-BU 473 High Speed Cooling Fan Relay Control
51-52 - - Not Used
53 GY 2709 5-Volt Reference 1
54-56 - - Not Used
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.