Product Description
Michigan Motorsports 187 Degree Thermostat with Housing & Seal
Fits 1999–2006 GM LS-Based V8 Engines | 4.8L 5.3L 5.7L 6.0L
The Michigan Motorsports 187 Degree Thermostat with Housing and Seal is a high-quality, OE-style replacement designed for 1999–2006 GM LS-based V8 engines. Featuring the factory-correct 187-degree operating temperature, this assembly helps maintain proper engine warm-up, cooling efficiency, and drivability. It includes a durable aluminum thermostat housing, thermostat, and seal, offering an economical alternative to GM parts while retaining OE-level fitment and performance. Ideal for stock replacements, maintenance, and engine refreshes.
Key Features & Benefits
- Factory-Correct 187° Operating Temperature: Maintains OEM cooling strategy for proper warm-up, fuel efficiency, and engine longevity on LS-based platforms.
- Complete Ready-to-Install Assembly: Includes aluminum thermostat housing, 187-degree thermostat, and seal to simplify installation and reduce downtime.
- OE-Level Fit & Function: Designed to match factory dimensions and sealing surfaces for leak-free operation and reliable cooling performance.
- Durable Aluminum Housing: Resists corrosion and deformation compared to plastic housings, ensuring long-term durability.
- Cost-Effective OEM Replacement: Replaces GM #12600172 while delivering dependable Michigan Motorsports quality at a competitive value.
Included Components
- Aluminum Thermostat Housing
- 187 Degree Thermostat
- Thermostat Seal
Key Fitments (Gasoline V8 Models Only)
- Buick Rainier: 2004–2006
- Cadillac CTS: 2004–2005
- Cadillac Escalade: 2002–2006
- Chevrolet Avalanche 1500: 2002–2006
- Chevrolet Camaro: 1998–2002
- Chevrolet Corvette: 1997–2008
- Chevrolet Express 1500: 2004–2006
- Chevrolet Express 2500: 2003–2006
- Chevrolet Express 3500: 2003–2006
- Chevrolet Silverado 1500: 1999–2006
- Chevrolet Silverado 2500: 1999–2006
- Chevrolet Silverado 3500: 2001–2006
- Chevrolet SSR: 2003–2006
- Chevrolet Suburban 1500: 2000–2006
- Chevrolet Suburban 2500: 2000–2006
- Chevrolet Tahoe: 2000–2006
- Chevrolet Trailblazer: 2004–2006
- GMC Envoy: 2004–2006
- GMC Savana 1500: 2004–2006
- GMC Savana 2500: 2003–2006
- GMC Savana 3500: 2003–2006
- GMC Sierra 1500: 1999–2006
- GMC Sierra 2500: 1999–2006
- GMC Sierra 3500: 2001–2006
- GMC Yukon: 2000–2006
- GMC Yukon XL 1500: 2000–2006
- GMC Yukon XL 2500: 2000–2006
- Hummer H2: 2004–2006
- Isuzu Ascender: 2004–2006
- Pontiac Firebird: 1998–2002
- Pontiac G8: 2008–2009
- Pontiac GTO: 2004–2006
- Saab 9-7X: 2005–2006
