As described and much more reliable than the original 2003 Silverado 5.3 Vortec 105 A alternator. No more hissing, the difference is noticeable and very satisfied. The original belt was marked 923, which puzzled me at first, but it's about the same exact size and fit. Autozone/Advanced belts are nowhere near as thick and strong as Continental belts.
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Efficiently Install & Remove Serpentine Belts With OEMTOOLS 25149 Tool: 13-18Mm Sockets, 1/2 & 3/8 Inch Drive, Long Handle For Optimal Leverage!
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