GM 24588465 Starter Assembly, .

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To remove and replace the starter, follow these steps: Begin by disconnecting the cable from the negative terminal of the battery, then raise the vehicle and secure it on jackstands. For 4.3L V6 (2014 and earlier), 5.0L, 5.7L, and 7.4L V8 engines, remove the solenoid heat shield from the solenoid and disconnect the electrical leads from the solenoid terminals. Next, remove the nuts securing the battery cable and switch lead to the stud terminals on the starter solenoid, and disconnect both wires from the terminals. If necessary, leave them connected until the starter is removed from the transmission bellhousing. Proceed to remove the starter mounting bolts and shims (if equipped), making sure to support the starter to prevent it from hanging by the wiring harness. For 7.4L V8 engines, if you plan to replace the starter, remove the heat shield from the solenoid and install it on the new starter assembly. Finally, installation is the reverse of removal, ensuring that the starter mounting bolts are tightened to the specified torque. For 4.3L V6 (2018 and later), 4.8L, 5.3L, and 6.0L V8 engines, start by removing the right bellhousing cover retaining bolt and reposition the engine oil cooler if necessary. Remove the starter mounting bolts and disconnect the electrical connector from the oil level sensor. Move the starter toward the front of the vehicle until it clears the transmission bellhousing, supporting it to prevent damage. Disconnect the battery cable and electrical connector from the starter solenoid, then proceed with the installation in reverse order, ensuring the starter mounting bolts are tightened to the specified torque.

To assess the adjustment of the PNP switch, verify whether the starter engages when the ignition switch is turned to the start position.