What is Starter MotorStarter motor is an electric motor that rotates the engine's flywheel to start the engine. It is typically located near the bottom of the engine and is activated by turning the ignition key.Fitmentfor Buickfor Rainier 4.2L 2006-2007for Chevyfor Trailblazer 4.2L 2006-2007for GMCfor Envoy 4.2L 2006-2007for Isuzufor Ascender 4.2L 2006-2007for Saabfor 9-7x 4.2L 2006-2008Part Number8890178460,686696033357,12581305,89017846Item DescriptionStarterKW: 1.7 KWMounting Hole 1: 10 mm Id UnthreadedMounting Hole 2: 10 mm Id UnthreadedPinion/Splines OD29.5 mm / 1.161 in RotationCwClockwiseTeeth11 TeethTypePMGRVoltage12 VoltsWeight7.85lbs / 3.57 kg8lbsTeeth on Drive11Volts12Installation1. Take out the wiring and positive battery cable from the starter solenoid.2. Take out the starter retaining bolts. Take out the starter.3. Compare the new starter to verify it will work on.4. Transfer any heat shield and/or brackets (if equipped) to the substitution: starter.5. Replace with the new starter and connecting the wire.Instruction of Starter MotorRefer to the vehicle's owner's manual or a repair manual for specific instructions on how to uninstall and reinstall the starter motor. Follow the instructions carefully to ensure proper installation and avoid damage to the vehicle or components.