Is your truck's battery light on or are electrical accessories acting weak? Your alternator might be calling it quits. This RAREELECTRICAL alternator is a brand-new, 12-volt, 145-amp unit designed as a direct replacement for a wide range of GM trucks and SUVs from the early 2000s. It's a heavy-duty unit (over 15 lbs) with an internal fan and an external voltage regulator. It replaces OEM numbers like Delco 15754097, GM 10464476, and Bosch AL8515X. Fits many vehicles including the Chevy Tahoe, Avalanche, and Silverado 1500/2500/3500 (with various V8 engines like the 5.3L and 6.0L), Cadillac Escalade, and Buick Rainier from around 2003-2006. The listing has a huge application list, but you must verify it matches your specific vehicle's year, engine, and original part number before purchasing. A solid, high-output replacement to keep your battery charged and all your electronics running.