OEM Replacement for GM 12576447: Direct replacement for factory part GM# 12576447, replace 4K378, K040378, K040378HD, 4PK960, 4PK962, 5040378, 5040378HD, 4040378, and other 4PK960 AC compressor belts. Precision-engineered to match OE performance and fit
Compatible with Cadillac, Chevy & GMC V8 Models: Fits popular 4.8L, 5.3L, and 6.0L V8 engines on Escalade, Silverado, Tahoe, Suburban, Avalanche, Express, Sierra, Yukon, Savana. Check fitment chart for exact compatibility
Durable EPDM Construction: Built with high-strength EPDM rubber and fiber-reinforced cords to resist cracking, stretching, and glazing. Withstands extreme heat, cold, and vibration for extended service life
Smooth & Quiet Operation: Multi-rib design provides stable grip and minimal slippage for consistent AC performance. Reduces belt noise and vibration compared to worn or generic belts
Easy Installation: Designed for a factory-fit and hassle-free replacement. Depending on model year, some vehicles require a stretch-fit tool (for elastic belts) or tensioner release (for standard belts). Refer to service manual or professional installer