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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 417 (COMPONENT LOCATIONS & COMPONENT CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSPOWERTRAIN CONTROL MODULE (PCM) X1 (L26-NU6)
2008 Pontiac Grand Prix Base

Powertrain Control Module (PCM) X1 (L26-NU6)

2008 Pontiac Grand Prix BaseSECTION Powertrain Control Module (PCM) X1 (L26-NU6)
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Powertrain Control Module (PCM) X1 (L26-NU6) Connector End View
GM1228485Courtesy of GENERAL MOTORS CORP.
Powertrain Control Module (PCM) X1 (L26-NU6)

Pin Wire Circuit Function
1-3 - - Not Used
4 0.35 GY 2700 5-Volt Reference 1
5 - - Not Used
6 0.35 BN/WH 419 MIL Control
7 0.35 BK 2751 Low Reference
8 0.35 BK 2759 Low Reference
9 - - Not Used
10 0.35 WH 1310 EVAP Canister Vent Solenoid Valve Control
11-14 - - Not Used
15 0.35 D-GN 1049 PCM Class 2 Serial Data
16-17 - - Not Used
18 0.35 BN 1141 Ignition 3 Voltage
19 0.35 PK 439 Ignition 1 Voltage
20 0.35 OG 540 Battery Positive Voltage
21 0.35 WH 121 Engine Speed Signal (JL9)
22 0.35 D-GN 389 Vehicle Speed Signal
23 0.35 YE/BK 625 Starter Enable Relay Control
24 0.35 BN 5069 Powertrain Relay Control
25 - - Not Used
26 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
27-30 - - Not Used
31 0.35 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
32 0.35 WH 17 Stop Lamp Switch Signal
33 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control
34-36 - - Not Used
37 0.35 D-GN/WH 465 Fuel Pump Relay Control
38-42 - - Not Used
43 0.35 PU 1589 Fuel Level Sensor Signal
44 0.35 GY 1884 Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45-47 - - Not Used
48 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
49 - - Not Used
50 0.35 D-BU 473 High Speed Cooling Fan Relay Control
51-52 - - Not Used
53 0.35 GY 2709 5-Volt Reference 1
54-56 - - Not Used
Connector Part Information 
  • OEM: 15418488
  • Service: 88953346
  • Description: 56-Way F Micro-Pack 64 Series (BU)
Terminal Part Information 
  • Pins: 4, 6-8, 10, 15, 18, 19, 20, 22-24, 26, 31-33, 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)
  • Pins: 21
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
RENDER: 1.0x

NO RELATED

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

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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