OEM 2008 Chevrolet Express 3500 Throttle Body

2008 Chevrolet Express 3500 Throttle Body Parts Questions & Experts Answers

• Q: How to replace the throttle body assembly on 2008 Chevrolet Express 3500?

  A: Before replacing the Throttle Body assembly begin by removing the air cleaner assembly followed by unclipping both the accelerator control and cruise control cables from the Throttle Body before disconnecting the vacuum hose. Begin by removing the throttle position (TP) sensor and idle air control (IAC) valve harness connectors and separating coolant hoses from both the Throttle Body and the vapor vent pipe. You should detach all Throttle Body attaching nuts before removing the Throttle Body while discarding the old gasket. Avoid using tools in the Throttle Body area because it could harm the wedge shape and never submerge a Throttle Body in cold immersion type cleaner which can deteriorate pre-installed sealing compounds. Use gm x-66a spray cleaner or gm p/n 1052626 to clean the Throttle Body while ensuring the tp sensor and iac valve avoid solvent contact. When ready to reinstall the Throttle Body use fresh gasket material and tighten all attaching nuts to 10 n.m (89 lb in). Iac valve electrical connectors together with cruise control cable and accelerator control cable and tp sensor and vacuum tube and coolant hoses. Reinstall the air cleaner assembly while verifying accelerator pedal movement when the engine is off. Reset the iac valve through a procedure of 10-second ignition followed by a 5-second off period and engine start to verify correct idle speed.