Vehicle Compatibility Information For GMC Sierra 2500 HD 2006-2008 V8 6.6L w/ TPS Sensor For GMC Sierra 3500 HD 2007-2008 V8 6.6L w/ TPS Sensor For Chevrolet Silverado 2500 HD 2006-2008 V8 6.6L w/ TPS Sensor For Chevrolet Silverado 3500 HD 2007-2008 V8 6.6L w/ TPS Sensor What is a throttle body ? The throttle body is the part of the engine that mixes air with the fuel to allow combustion to take place. When a throttle body gets clogged with carbon, the vehicle may suffer from issues ranging from a lack of fuel mileage, loss in efficiency or may even become totally inoperable. When you need to replace the throttle body: .
