Four Seasons 20019 Engine Cooling Fan Switch

Engine Cooling Fan Switch for GM Trucks

Four Seasons 20019 is an engine-mounted temperature switch for cooling fan control in select Chevrolet and GMC applications. It uses a female connector with a black housing, an oval/rectangular connector shape, and a 1/8 in. pipe thread size for direct replacement service.

Built to meet or exceed OEM requirements, this Four Seasons Temperature Switch is specified to turn the fan circuit off at 211 degrees and on at 234 degrees. It is a practical replacement for GM trucks and vans that rely on engine-mounted auxiliary fan control, including Chevrolet P30, GMC P3500, and related C/K-series applications.

Key Features

• Four Seasons Temperature Switch line for engine cooling fan control
• Part number 20019
• Engine-mounted design for cooling fan operation
• Black female connector with 1 terminal
• Connector shape listed as oval and rectangular
• 1/8 in. pipe thread size (13/32 x 27)
• Fan open/closed function: open
• Temperature off at 211 degrees and on at 234 degrees
• Meets or exceeds OEM specifications

Product Details

The Four Seasons Temperature Switch brand line focuses on temperature-based switching for cooling system control. This 20019 engine cooling fan switch is used on engine-mounted auxiliary fan systems and temperature-controlled fan circuits found in Chevrolet and GMC commercial and heavy-duty platforms. It is a direct-fit style replacement for applications such as Chevrolet P30, Chevrolet G30, Chevrolet C2500, GMC G3500, and GMC Savana 3500. This part cross-references Baldwin 20019 for the same application.

Common Problems This Part Can Address

• Cooling fan not switching on at the correct engine temperature
• Cooling fan staying on longer than expected after warm-up
• Intermittent auxiliary fan control on engine-mounted systems
• Temperature-related fan cycling issues in GM truck and van cooling systems
• Replacement needs for worn or inaccurate fan temperature switches

Installation Notes and Tips

• Verify the connector style, terminal count, and thread size before installation.
• Confirm the temperature on and off points match the original specification.
• Inspect the cooling system and wiring connector for corrosion or damage before replacing the switch.
• Use the vehicle application data to confirm fitment for Chevrolet and GMC models listed above.

Quality Assurance

Four Seasons 20019 is manufactured to meet or exceed OEM requirements for the listed applications. It is a temperature switch built for engine-mounted cooling fan control in Chevrolet and GMC vehicles from 1991-1999, including P30, P3500, G30, G3500, Savana 3500, C/K-series, and related Suburban applications.