A quality set of factory GM belts is the most dependable way to run everything from your crankshaft to the many other moving parts in your vehicle. There are almost as many types of belts in a vehicle as there are major systems. Serpentine and drive belts, for example, might help move your alternator and power steering system, but they can keep a lot more than that going. Timing belts or timing chains help your camshaft turn so that it pumps your engine valves and pistons at the right intervals. Climate control belts and fan belts, on the other hand, work together with the serpentine belt, moving the many parts of a heater and AC system. If your vehicle isn't performing up to standards or it's completely disabled, there's a good chance that worn or bad belts are the cause. Signs and symptoms include visibly loose belts or belt damage. Your vehicle might chirp or screech while it's running. You might even have problems with your battery or interior lighting. Sometimes, even an engine misfire, overheat, or failure can indicate them, not to mention other systems' failures. How often need to replace belts varies by mileage and your driving situation. Timing chains in newer cars and trucks, however, should last an engine's lifetime. When in doubt, check the maintenance schedules found in your owner's manual. When it's time to order the best GM belts for your project, you'll find them in the huge selection here at our online auto parts center. Buy now, enjoy peace of mind later!