Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Powertrain Control Module (PCM) X3 (L26-NU6)
2008 Pontiac Grand Prix BaseSECTION Powertrain Control Module (PCM) X3 (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.
Powertrain Control Module (PCM) X3 (L26-NU6)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1-3 | - | - | Not Used |
| 4 | 0.35 TN/WH | 3121 | HO2S Low Signal |
| 5 | 0.35 YE/BK | 1227 | TFT Sensor Signal |
| 6 | 0.35 YE | 492 | MAF Sensor Signal |
| 7 | - | - | Not Used |
| 8 | 0.35 BK/WH | 3122 | HO2S Heater Low Control - Sensor 2 |
| 9-10 | - | - | Not Used |
| 11 | 0.35 RD/BK | 1230 | AT ISS High Signal |
| 12 | 0.35 YE | 400 | VSS High Signal |
| 13-14 | - | - | Not Used |
| 15 | 0.35 GY | 773 | Transmission Range Switch Signal C |
| 16-18 | - | - | Not Used |
| 19 | 0.35 PU | 3120 | HO2S High Signal |
| 20-21 | - | - | Not Used |
| 22 | 0.35 YE | 772 | Transmission Range Switch Signal B |
| 23 | 0.35 WH | 776 | Transmission Range Switch Signal P |
| 24 | 0.35 WH | 1804 | TCC Release Switch Signal |
| 25 | - | - | Not Used |
| 26 | 0.35 TN | 472 | IAT Sensor Signal |
| 27-32 | - | - | Not Used |
| 33 | 0.35 L-GN | 1222 | 1-2 Shift Solenoid Valve Control |
| 34 | 0.35 BK/WH | 771 | Transmission Range Switch Signal A |
| 35-38 | - | - | Not Used |
| 39 | 0.35 TN/BK | 422 | TCC Solenoid Valve Control |
| 40-43 | - | - | Not Used |
| 44 | 0.35 PU | 401 | VSS Low Signal |
| 45 | - | - | Not Used |
| 46 | 0.35 YE/BK | 1223 | 2-3 Shift Solenoid Valve Control |
| 47 | 0.35 RD/BK | 1228 | PC Solenoid Valve High Control (Sol. A) |
| 48 | 0.35 BK | 452 | Low Reference |
| 49 | 0.35 D-BU/WH | 1231 | AT ISS Low Signal |
| 50 | 0.35 BK | 2760 | Low Reference |
| 51 | 0.35 L-BU/WH | 1229 | PC Solenoid Valve Low Control (Sol. A) |
| 52-56 | - | - | Not Used |
Connector Part Information
|
Terminal Part Information
|
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.