1969–1979 Chevrolet Chevy II Nova NOS Heater Control Switch #3967939

Offered for sale is a genuine New Old Stock (NOS) Chevrolet Heater Control Switch, part number 3967939, designed for various 1969–1979 Chevrolet Chevy II and Nova applications. This original GM HVAC control component is an increasingly hard-to-find restoration part for collectors, restorers, and enthusiasts seeking authentic factory replacement parts.

The Chevrolet Chevy II and Nova remain among the most popular compact and mid-size Chevrolet vehicles ever produced. Known for their versatility, dependable performance, and timeless styling, these vehicles served a wide range of buyers from economical daily transportation to high-performance muscle car enthusiasts. Today, Novas from this era continue to enjoy strong demand within the collector car community.

A properly functioning heater control system is essential for driver comfort and vehicle operation. The heater control switch plays a critical role in regulating heater functions and allowing occupants to control airflow and heating performance. Over time, original switches may become worn, corroded, damaged, or fail due to decades of use and electrical wear.

Many restoration projects encounter issues with aging HVAC controls, making original replacement components highly desirable. This genuine GM heater control switch was manufactured during the original production period and remained unused in inventory. Unlike reproduction components or used switches, this NOS part retains the original factory specifications, construction, and reliability intended by Chevrolet engineers.

For enthusiasts striving to maintain authenticity, original GM service parts provide the correct appearance, fitment, and functionality needed for a factory-correct restoration.

Product Features

• Genuine General Motors New Old Stock (NOS) part
• Chevrolet Part Number: 3967939
• Original GM heater control switch
• Correct for various 1969–1979 Chevrolet Chevy II and Nova applications
• HVAC and heating system component
• Never installed on a vehicle
• Factory-original electrical part
• Correct fit and operation
• Ideal for restoration and repair projects
• Hard-to-find original Chevrolet switch

Vehicle Compatibility

Commonly associated with:

• 1969 Chevrolet Chevy II
• 1969 Chevrolet Nova
• 1970 Chevrolet Nova
• 1971 Chevrolet Nova
• 1972 Chevrolet Nova
• 1973 Chevrolet Nova
• 1974 Chevrolet Nova
• 1975 Chevrolet Nova
• 1976 Chevrolet Nova
• 1977 Chevrolet Nova
• 1978 Chevrolet Nova
• 1979 Chevrolet Nova

Fitment may vary depending on engine package, trim level, heater configuration, and production date. Buyers should verify compatibility before purchase.

Why Choose NOS GM Electrical Components?

New Old Stock parts are highly valued because they were produced by the original manufacturer and never installed. Original GM electrical components provide factory-correct specifications, proper connector configurations, and authentic appearance.

Unlike many aftermarket replacements, genuine GM switches were designed specifically for the intended application, helping ensure reliable operation and restoration accuracy.

Importance of the Heater Control Switch

The heater control switch is a key component within the vehicle’s HVAC system. It helps regulate heater functions and allows occupants to control cabin comfort. A faulty switch can result in improper heater operation, loss of functionality, or inconsistent performance.

Replacing a worn switch with a genuine GM NOS component helps restore proper operation while preserving factory originality.

Condition

This heater control switch is described as New Old Stock (NOS). The component has never been installed and remains an original GM service replacement part. Due to decades of storage, minor shelf wear, packaging deterioration, or handling marks may be present.

Buyers should carefully review all available photographs to determine the exact condition of the item being offered.

Perfect for Restoration Projects

Whether you are restoring a high-performance Nova, preserving an original survivor vehicle, repairing a daily driver, or completing a concours-level project, this NOS heater control switch provides an excellent opportunity to obtain authentic GM HVAC components.

Original electrical parts are becoming increasingly difficult to locate, making genuine NOS pieces highly desirable among restorers who value authenticity and reliability.

Collector Appeal

The Chevrolet Nova remains one of Chevrolet’s most collectible and enduring nameplates. As original GM service parts continue to disappear from inventories, authentic NOS electrical components have become increasingly sought after.

This genuine NOS Heater Control Switch #3967939 represents an excellent opportunity to acquire an original Chevrolet component for your restoration project. Whether installed on a vehicle or preserved in a collection of vintage parts, it remains a valuable piece of Chevrolet history.