GMC 12603371 Fuel Injector Fuel Motor Body Kit

You can Select Your Vehicle to check if 12603371 fits your vehicle.

Start by disconnecting the cable from the negative terminal of the battery to remove the throttle body. Remove the engine cover and air intake duct. Depending on model year, you will need to disconnect electrical connectors from either TAC or TP sensor and IAC valve. On older models however, you should disconnect accelerator cable as well as cruise control cable from throttle body and take away accelerator cable bracket. However, on newer models, check for damage and if necessary replace them by removing any coolant or vacuum hoses from these bodies; also remove accelerator cable bracket. Move out all bolts/nuts which holds throttle body, throw away old gasket and clean mating surfaces between this one and manifold intake. Use a new gasket for throttle body installation; undo removal procedure in reverse order ensuring that you tighten mounting bolts with specified torque value.

Remove the air intake duct and inspect the throttle body for carbon build-up. If dirty, clean with a sensor-safe solvent. Disconnect the throttle body's electrical connector, remove its mounting fasteners, and discard the old gasket. Install in reverse order, using a new gasket and tightening to torque specifications. Start the engine to check the throttle body's operation and ensure no air leaks.

Pry the bracket locking tabs away from the fuel meter body and remove the assembly.

Use new gaskets and o-rings where necessary and tighten fasteners to proper torque specifications.

Start the engine and verify that the throttle body operates correctly and that there are no air leaks.

Discard the old gasket.