OEM 2001 GMC Savana 2500 Intake Manifold

2001 GMC Savana 2500 Intake Manifold Parts Questions & Experts Answers

• Q: How to replace the lower intake manifold on 2001 GMC Savana 2500?

  A: To remove lower Intake Manifold, you will firstly disconnect battery negative cable and remove engine cover. Turn the coolant system drain to let all the liquid out of the system. Then, remove the air cleaner outlet retaining nut and the air cleaner outlet duct from the Throttle Body assembly . Take off the harness connector of the intake air temperature (IAT) sensor, disconnect the air cleaner outlet duct from the mass air flow (MAF), remove the air cleaner outlet duct and assembly. Remove the accelerator control cable and cruise control cable from the throttle shaft and bracket, PCV Valve Hose assembly (PCV valve hose assembly) off the Intake Manifold and valve rocker arm cover. Remove the electrical connectors for the throttle position (TP) sensor , idle air control (IAC) motor , engine coolant temperature (ECT) gauge sensor , a/c high pressure switch if equipped, fuel meter body assembly connector , evap canister purge solenoid valve , and manifold absolute pressure (MAP) sensor ). Also unplug A/C Compressor clutch if it's available, egr valve and engine coolant temperature (ECT) sensor. Ground wire should be connected to the stud at the water outlet, the radiator inlet hose, heater hose, water pump inlet hose, a/c vacuum hose, and power Brake Booster Vacuum Hose. Unfasten the power brake boostervacuum hose bracket and nut, accelerator controlcable bracket, evap canister purge solenoid valve, distributor, and disconnect the fuel supply and return pipesbefore the back of the Intake Manifold. Unplug the ignition control module (ECM), the Spark Plug wire harness retainer from the EGR Valve inlet pipe and the clamp bolt for the EGR Valve inlet pipe, and the EGR Valve inlet pipe it self. To run the screw for the front Intake Manifold stock, remove the auxiliary evaporator tube from the A/C Compressor if one is included, remove the Drive Belt, loose the nut for the back bracket for the power steering pump ones, remove the bolts and nut for the power steering pump mounting bracket for a piece to slide forward to access the bolt at the front of the Intake Manifold. Unplug the engine coolant temperature (ECT) sensor wire connector as an option and remove the lower Intake Manifold bolts, Intake Manifold assembly and discard the lower Intake Manifold gaskets. Clean the sealing surfaces and Intake Manifold, and in case of need to replace, proceed with the disassembly and assembly. For installation, note patch, approximately 4.0 mm (0.157 in), adhesive gm p/n 12346141 and comparable, to the cylinder head side of the lower Intake Manifold gasket at each end, and while the adhesive is still in its wet state, fit the gasket. Mount the lower Intake Manifold gasket onto the cylinder head using the gasket locator pins and apply a 5mm (0.197 inch) bead of adhesive gm p/n 12346141 or equiv. Along the front and rear tops of the engine block extending said bead 13mm (0.50 inch) onto each lower Intake Manifold gasket. Mount the lower Intake Manifold onto the engine block, and apply threadlock gm p/n 12345382 or equivalent to the lower Intake Manifold bolt threads if being reused, and then mount and tighten lower Intake Manifold bolts as outlined in a sequence to specified torque values. Reposition the power steering pump mounting bracket, the power steering pump mounting bracket bolts and nut together with the Drive Belt and the auxiliary evaporator tube in case it is fitted. Mount the EGR Valve inlet pipe, evap canister purge solenoid valve, and reconnect the fuel supply & return pipes. To obtain the correct timing of the engine, position the engine at the top dead center of number one cylinder, remove the Spark Plug of number one cylinder, rotate the Crankshaft to bring number one cylinder to the compression stroke, align the reference marks, and reinstall the Spark Plug and the Distributor. Mount the ecm, accelerator control cable bracket, power Brake Booster Vacuum Hose bracket, and attach the power Brake Booster Vacuum Hose and a/c vacuum hose. Install the water pump inlet hose, heater hoses, and radiator inlet hose and plug the electrical connectors for tp sensor , iac motor , ect gauge sensor, a/c high pressure switch if equipped, fuel meter body assembly connector, evap canister purge solenoid valve, map sensor, a/c compressor clutch if equipped, egr valve, and ect sensor . Attach the ground wire and nut to the water outlet stud and tighten the ground wire nut and connect the PCV Valve Hose assembly. Install the cruise control cable if available, the accelerator control cable, refill the cooling system, and install the air cleaner outlet duct to the maf sensor. The iat sensor harness connector is connected, the air cleaner outlet duct is installed on the Throttle Body assembly, tightening up the retaining nut, the air cleaner assembly is installed, the battery negative cable is restored, and lastly, the engine cover is installed.