Gates 31532 Radiator Cap

OE Type Radiator Cap for GM Applications

The Gates 31532 OE Type Radiator Cap is built for closed cooling systems that require accurate pressure control and a threaded coolant bottle cap design. With a 15 psi pressure rating and OE performance comparison, it supports proper cooling-system sealing for a wide range of Chevrolet, GMC, Cadillac, and related GM vehicles.

Gates radiator pressure caps use corrosion-resistant metal or high-quality plastic, depending on application, to help maintain long service life and consistent pressure control. The 31532 is manufactured to meet or exceed OEM specifications in function, form, and fit.

Key Features

• Part number: Gates 31532
• OE Type Radiator Cap for closed coolant recovery systems
• 15 psi pressure rating with SAE pressure range of 14-18 psi
• Threaded coolant bottle cap design
• Filler neck inside diameter: 1.15 in. / 29 mm
• Filler neck outside diameter: 1.81 in. / 46 mm
• Filler neck depth: 1.1 in. / 28 mm
• Shell diameter: 2.56 in.
• OE performance comparison rating

Detailed Description

This radiator cap is engineered for vehicles that use a closed coolant recovery system and a threaded bottle-style cap. The Gates 31532 helps maintain the pressure level needed for stable cooling-system operation, making it a direct-fit service part for many GM trucks, SUVs, and crossovers. Common fitment includes 2000-2010 Chevrolet Tahoe, 2000-2010 GMC Yukon, and 2003-2021 GMC Savana 2500 and Savana 3500 applications, along with many other Chevrolet Silverado and GMC Sierra models.

This part cross-references Dorman - HELP 46056 and Four Seasons 33055 for the same application. If you are replacing a worn or leaking cap on a Chevrolet Express, GMC Sierra, or Cadillac Escalade cooling system, Gates 31532 provides the OE-style dimensions and pressure rating needed for proper service.

What It Helps Address

• Coolant loss from a cap that no longer seals correctly
• Pressure irregularities in a closed cooling system
• Overflow or recovery bottle sealing concerns
• Cooling-system service on GM trucks and SUVs with threaded bottle caps
• Replacement of a cap with worn threads, damaged seals, or corrosion

Installation Notes and Tips

Verify the filler neck dimensions, cap depth, and pressure rating before installation. This cap is specified for a 15 psi system and should be matched to the vehicle’s original cooling-system requirements. Confirm the application against the vehicle’s year, make, and model, especially on Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade platforms where multiple cooling configurations may exist.

For best results, inspect the filler neck and sealing surfaces for damage or contamination before installing the new cap. A clean, undamaged neck helps the cap maintain proper pressure and sealing performance.

Quality Assurance

Gates manufactures this OE Type Radiator Cap to meet or exceed OEM specifications in function, form, and fit. It is built with corrosion-resistant materials and designed to meet environmental regulatory standards while delivering accurate pressure control for long service life.