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2008 GMC Sierra 1500 SL, ECM/Inputs/Outputs Photo
Posted to the Waveform Library on 2/24/2010

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.

Robert from Florida


car Vehicle Data

2008 GMC Sierra 1500 SL 4.8L

Engine4.8 L / 8 cyl / GAS
Trans4-speed AutomaticTransmission (Electronic)
DeliveryFuel Injection
ConditionKnown Bad