1968-1974 Corvette C3 Door Ajar and Under Hood Anti-Theft Switch 3929804

1968-1974 C3 Door Ajar and Under Hood Anti-Theft Switch 3929804 - OEM Number(s) (3929804)

Restore proper function with a precision-threaded switch that keeps your Corvette secure and reliable.

This OE-style reproduction switch delivers factory-correct fit and performance for your C3 Corvette. With a 3/8"-24 thread and compact 1 23/32" overall length, it installs directly into the original mounting location. Built to original GM specifications, it restores the accuracy of your Corvette’s electrical and warning systems while preserving authenticity.

Fits the Following Corvette Models:

• 1968–1974 Corvette (C3, applications as originally equipped)

Material/Finish

• Precision-machined metal body

• Nickel-plated finish for durability and corrosion resistance

Dimensions

• Overall length: 1 23/32" (43.65 mm)

• Thread size: 3/8"-24 (fine thread)

• Hex width: 7/16" (11.11 mm, across flats)

• Shaft length beyond threads: approx. 7/8" (22.22 mm)

Features/Benefits

• Direct replacement switch for 1968–1974 Corvettes

• 3/8"-24 thread spec for correct fitment

• 7/16" hex width for easy installation with proper wrench size

• Restores electrical and warning system accuracy

• Nickel-plated finish resists corrosion for long service life

• GM reference part number 3929804

Because Details Matter

Small hardware defines how a Corvette feels to work on. This switch threads in smoothly, tightens down with the right hex size, and restores the secure function your Corvette was designed with. For restorers, even the smallest threads and fittings matter in keeping your build authentic and correct.

Parts You Will Need

• 

  1968-1974 C3 Courtesy and Door Ajar Switch Terminal Repair Kit 6288128

• 

  1968-1976 Door Ajar Warning Switch Plate Door Jamb Rear 3938168

Also known under these part numbers: (For reference only)

• 03929804
• 25-124759-1
• 3929804
• 593142
• 686420082651
• A9575
• E3755
• ES-340
• SW102