Calorstat RC0147 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for GM Applications

Calorstat RC0147 is a pressurized engine coolant reservoir cap built with plastic and rubber for a threaded reservoir neck. Rated at 15.0 psi, it helps maintain the cooling system pressure needed for stable coolant circulation in a wide range of GM vehicles, including Chevrolet Silverado, Tahoe, and GMC Sierra applications.

Use RC0147 when you need a standard replacement cap for GM coolant expansion tanks and reservoir systems. Vernet is an OE supplier to GM, and this cap is listed across many Chevrolet, GMC, Cadillac, Buick, Pontiac, Saturn, Hummer, and Oldsmobile models.

Key Features

• Engine coolant reservoir cap with threaded attachment
• Plastic and rubber construction for sealing performance
• 15.0 psi maximum pressure rating
• Pressurized, standard-style design
• No pressure release lever
• Direct replacement for many GM cooling system applications

Detailed Description

Calorstat RC0147 is designed for vehicles that use a pressurized coolant reservoir cap to help regulate system pressure and support proper coolant expansion and recovery. The threaded design secures to the reservoir neck, while the plastic and rubber construction provides the sealing interface needed for everyday cooling system service. This part cross-references Gates 31532 for the same application.

Compatible vehicle coverage includes Fits 2014-2018 Chevrolet Silverado 1500, N/A; Fits 2015-2019 Chevrolet Silverado 2500 HD, N/A; Fits 2015-2020 Chevrolet Tahoe, N/A; Fits 2007-2010 GMC Acadia, N/A; and Fits 2015-2020 GMC Yukon, N/A. It also appears on many other GM platforms from 1999 through 2023, making RC0147 a practical replacement choice for service work on Chevrolet Silverado, GMC Sierra, and Cadillac Escalade cooling systems.

What It Helps Address

• Loss of coolant reservoir pressure
• Coolant seepage at the reservoir cap
• Pressure-related cooling system warning conditions
• Cap wear, cracking, or seal deterioration
• Incorrect fitment on threaded GM reservoir necks

Installation Notes and Tips

Inspect the reservoir neck and sealing surface before installation. Replace the cap only after the cooling system has cooled completely, then thread RC0147 on securely by hand. Verify the pressure rating and reservoir style match the original part before service. For fitment verification, compare the original cap design and application against your vehicle’s cooling system.

Quality Assurance

Calorstat and Vernet are established OE-focused names in engine cooling components, and this part is listed as an OE-supplier application for GM platforms. Part number RC0147 is specified for broad GM coverage and is built to meet the pressure and sealing requirements of pressurized coolant reservoir systems.