# MotoRad 7456-187 Fail Safe™ Series Thermostat for 1997-2006 Buick Rainier ### Specifications Bypass Diameter: 1.46" Bypass Length: 1.84" Flange Thickness: 0.05" Gasket/Seal Material: Rubber Installation Tool Included: No Jiggle Pin Weep Hole: Yes Number Of Seals: 1 Sealing Flange Outside Diameter: 2.13" Temperature (Degree): 187F ### Features - Exclusive, patented design - High quality Stainless Steel and Copper construction - Locking technology prevents costly engine damage - 100% tested and calibrated - Manufactured with the highest quality materials from an OE supplier ### Product Details Fail Safe™ Series Thermostat (7456-187) by MotoRad®. Temperature: 187F. Fail-Safe Thermostats offer premium, patented technology for superior protection over any thermostat on the market. Only Fail-Safe is designed to lock in the open position when overheating occurs due to a failing cooling system component. This allows maximum coolant flow, thus preventing expensive engine damage. Fail-Safe is designed to help protect your engine when overheating occurs. When overheating occurs, Fail-Safe automatically locks in the open position to permit maximum coolant flow. When standard thermostats fail, they lock in the closed position and prevent coolant flow to the engine, which can possibly cause serious damage to your engine. Fail-Safe has a patented safeguard against overheating damage. Fail-Safe thermostats are designed with a unique extra stroke that allows operation in two stages: Stage 1: Within normal operating temperatures, the Fail-Safe operates the same as any other thermostat. Stage 2: When overheating is caused by a deteriorating cooling system part, the Fail-Safe has a secondary stroke that activates a precision engineered piston that automatically locks the valve into a wide open position allowing coolant to circulate freely. Don’t be stranded on the side of the road because your engine overheated and your conventional thermostat failed in the closed position keeping coolant from flowing to the engine. Buy the best Thermostat on the market, the Fail-Safe Thermostat from Motorad. Why is the Fail-Safe the best thermostat? Under normal operating temperatures, the Fail-Safe operates in the same manner as a conventional thermostat. However, when your vehicle overheats due to a deteriorating cooling system part, a standard thermostat locks in the closed position blocking the flow of coolant to the engine. Motorad’s patented Fail-Safe Thermostat is the only thermostat that automatically locks in the open position allowing coolant to circulate freely throughout the engine during the overheating process. This can protect your engine from a more costly repair. Once the Fail-Safe thermostat does its job of allowing coolant to continue to flow to the engine during an overheating by locking in the open position, you must replace it with a new one. There are standard thermostats, then there is the Motorad Fail-Safe Thermostat. Ask for MotoRad’s Fail-Safe Thermostat the next time you need a new thermostat. Brand: MotoRad Part Number: 7456-187 UPC: 055644745688 Alternate MPN: 7456187 ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 2004-2006 Buick Rainier 2004-2005 Cadillac CTS 2002-2006 Cadillac Escalade 2002-2006 Chevy Avalanche 1998-2002 Chevy Camaro 1997-2006 Chevy Corvette 2003-2006 Chevy Express 2006 Chevy Monte Carlo 1999-2006 Chevy Silverado 1500 1999-2006 Chevy Silverado 2500 2001-2006 Chevy Silverado 3500 2003-2006 Chevy SSR 2000-2006 Chevy Suburban 2000-2006 Chevy Tahoe 2003-2006 Chevy Trailblazer 2003-2006 GMC Envoy 2003-2006 GMC Savana 1999-2006 GMC Sierra 1500 1999-2006 GMC Sierra 2500 2001-2006 GMC Sierra 3500 2000-2006 GMC Yukon 2001-2005 GMC Yukon Denali 2003-2005 Hummer H2 2003-2006 Isuzu Ascender 1998-2002 Pontiac Firebird 2005-2006 Pontiac Grand Prix 2004-2006 Pontiac GTO 2005-2006 Saab 9-7X ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the Vehicle Fitment Table above before purchase. **What part number is this?** The listed part number is 7456-187. **Is this product designed for direct replacement?** Yes. This product is intended to match the compatible vehicle applications listed in the fitment table. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering. ### Common Searches - Fail Safe™ Series Thermostat for Buick Rainier - 7456-187 fitment - MotoRad Fail Safe™ Series Thermostat - 2004 Buick Rainier Fail Safe™ Series Thermostat ## Details - **Price:** 33.13 CAD - **Vendor:** MotoRad - **Type:** Fail Safe™ Series Thermostat - **Tags:** 1997-2006 Chevy Corvette, 1998-2002 Chevy Camaro, 1998-2002 Pontiac Firebird, 1999-2006 Chevy Silverado 1500, 1999-2006 Chevy Silverado 2500, 1999-2006 GMC Sierra 1500, 1999-2006 GMC Sierra 2500, 2000-2006 Chevy Suburban, 2000-2006 Chevy Tahoe, 2000-2006 GMC Yukon, 2001-2005 GMC Yukon Denali, 2001-2006 Chevy Silverado 3500, 2001-2006 GMC Sierra 3500, 2002-2006 Cadillac Escalade, 2002-2006 Chevy Avalanche, 2003-2005 Hummer H2, 2003-2006 Chevy Express, 2003-2006 Chevy SSR, 2003-2006 Chevy Trailblazer, 2003-2006 GMC Envoy, 2003-2006 GMC Savana, 2003-2006 Isuzu Ascender, 2004-2005 Cadillac CTS, 2004-2006 Buick Rainier, 2004-2006 Pontiac GTO, 2005-2006 Pontiac Grand Prix, 2005-2006 Saab 9-7X, 2006 Chevy Monte Carlo, 7456-187, Automotive, Fail Safe™ Series Thermostat, MotoRad ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 33.13 CAD | In stock | ## Images - MotoRad 7456-187 Fail Safe™ Series Thermostat for 1997-2006 Buick Rainier --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/motorad-7456-187-fail-safetm-series-thermostat) > Updated: 2026-08-17