3.4l. Without awd. Without extended. S-series. 4.3l. All. Exc.Extended Wheelbase. 4 door. 5.3L. Helps reduce harmful pollutants from entering the atmosphere Captures fuel vapors to be re-burned in the engine This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Vapor Canister Purge Solenoid

2005-09. 2002-04. 4.3l. Location-Vapor Canister. 4.2L. 5.3L. All models. 6.0l. SSR. Controls fresh air flow to the canister Sends fuel vapors to the engine for re-burn Helps control fuel tank pressure

M.A.P Sensor

This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Oxygen Sensor, Front

Front. 4.2L. Detects oxygen content in the exhaust gases to help optimize emissions This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

A.I.R Pump

4.2L. Helps maintain controlled air flow to proper air injection components This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Check Valve

4.2L. Helps prevent exhaust from entering air pump This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors