Thermostat Housing for Sierra 18-1977-1, Mercruiser 47441A (OEM)

Includes: - Thermostat Housing

Fits Models: - GMC Sierra - Chevrolet Silverado - Mercruiser (marine applications)

Model Years: - 1999–2006

Submodels: - Sierra 1500, Sierra 2500, Sierra 3500 - Silverado 1500, Silverado 2500, Silverado 3500 - Chassis codes: GMT800, GMT900 - Body styles: Crew Cab, Extended Cab, Regular Cab

Engine Options: - 4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8, 6.6L Duramax Diesel - Engine codes: L33, L59, LQ4, LLY, LBZ

Description: This OEM Thermostat Housing is designed for reliable performance in GMC Sierra and Chevrolet Silverado models from 1999 to 2006. It ensures optimal engine temperature regulation, preventing overheating and maintaining efficiency. This part is also compatible with certain Mercruiser marine engines, making it versatile for both automotive and marine applications.

Features: - Direct OEM replacement for perfect fit - Durable construction for long-lasting performance - Ensures proper coolant flow and engine temperature - Compatible with various