GM 12652186 Belt, Generator & A/C Compressor

The serpentine drivebelt(s) are situated at the front of the engine and are crucial for the engine's operation, driving components such as the alternator, power steering pump, water pump, air conditioning compressor, and supercharger in later V8 models. Various configurations exist, from a single belt to multiple belts, and these belts are susceptible to wear, necessitating periodic inspections. The tension of the belt is automatically managed by the tensioner, which does not require manual adjustments; visual checks can be performed using the wear indicator marks on the tensioner body. To inspect the belts thoroughly, the engine must be turned to move the belt from the pulleys, allowing for a complete examination for cracks, fraying, and other damage. Small cracks on ribbed belts are generally acceptable unless they are extensive or deep. When replacing belts, it is important to note the routing of the belts on the pulleys. For single drive-belt models, the tension can be released using a ratchet or breaker bar, and the belt can be removed from the pulleys. For multiple drive-belt models, the outer belt should be removed first, followed by the inner belt, with the installation of new belts requiring careful seating in the pulley grooves. In V8 engines, specific steps involve removing the air filter housing duct and using a socket to release tension on the accessory drivebelt. For 2009 and later models, the outer supercharger drivebelt is removed first, followed by the accessory drivebelt, with installation procedures ensuring proper seating of the new belts. The air conditioning compressor drivebelt requires cutting for removal, and a special tool is used for installation. Tensioners can be detached from both V6 and V8 models by removing the securing bolts, with installation following the reverse order and ensuring proper torque on the tensioner bolts.