Standard Ignition PVS48 Ported Vacuum Switch

Ported Vacuum Switch for GM Emissions Control

Standard Ignition PVS48 is a ported vacuum switch built to OEM specification for precise fit and consistent operation. It uses a brass body with a high-temperature plastic housing and thermal elements designed for improved performance in emission-control systems.

Compatible with a wide range of Chevrolet, Pontiac, Buick, Oldsmobile, and GMC applications from 1979-1988, this PVS48 ported vacuum switch is a direct replacement for vehicles that use a 2-port, small-hose vacuum layout.

Key Features

• Brass and high-temperature plastic construction
• OEM-spec fit and performance
• Thermal element design for improved switching response
• 2 hose connectors
• 3/16" x 3/16" hose size
• 1/2"-14 NPT thread size
• Black finish

Detailed Description

The Standard Ignition PVS48 ported vacuum switch is engineered for emission-control vacuum routing on GM vehicles that rely on temperature-sensitive vacuum switching. It is commonly used in applications such as the Chevrolet Camaro, Caprice, Monte Carlo, El Camino, Corvette, and Pontiac Firebird, where accurate vacuum control supports proper EGR and related system operation. This part cross-references Dorman - HELP 81099 for the same application.

Standard Ignition builds this switch with controlled manufacturing processes from component selection through final assembly. The result is a replacement part designed to match original equipment dimensions and function for service on classic GM platforms.

What It Is Used For

• Restoring vacuum signal routing in emission-control systems
• Replacing a worn or leaking ported vacuum switch
• Addressing inconsistent EGR vacuum control
• Correcting vacuum-related drivability or idle concerns tied to switching failure
• Servicing GM vehicles with 2-port vacuum switch layouts

Installation Notes and Tips

Verify the hose size, thread size, and port count before installation. Confirm the vehicle’s emissions configuration and OE reference, especially on 1980s Chevrolet, Pontiac, Buick, Oldsmobile, and GMC models. Match the existing vacuum routing exactly and inspect hoses for cracks or hardening before installing the new switch. The PVS48 is listed for N/A position applications.

Quality Assurance

Standard Ignition manufactures this ported vacuum switch to OEM specification with brass and high-temperature plastic materials. The brand’s emission-component production process includes quality control from componentry through finished product, supporting consistent fit and function across listed applications.

• Fits 1988 Chevrolet Camaro, N/A
• Fits 1983-1988 Chevrolet Caprice, N/A
• Fits 1984-1988 Chevrolet Corvette, N/A
• Fits 1983-1988 Chevrolet Monte Carlo, N/A
• Fits 1980-1987 Pontiac Firebird, N/A
• Fits 1979-1985 GMC P3500, N/A