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2008 GMC Sierra 1500 SL, ECM/Inputs/Outputs Photo
Closeup of throttle potentiometers used in 2008 GMC Sierra. Look closely at the outermost (4th) track, you will see it wraps around and connects to the 2d track, at the opposite end. This throttle body had an internal failure where the 2 TP sensors did not agree after 75% throttle.
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| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
Vehicle Data
2008 GMC Sierra 1500 SL 4.8L
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
Video