1957-1988 GM 5/8" Quarter Turn Bulb Harness, Single

Upgrade your interior lighting with a dependable, OEM-style solution designed to fit a wide range of classic GM applications.

This 5/8" quarter-turn single bulb holder is the perfect replacement for worn or missing factory sockets, restoring clean, consistent backlighting to your dash and controls. It’s specifically designed to fit the rectangular information block found in select trucks, while also serving as a direct fit for heater control backlight locations—making it a versatile and practical upgrade for restoration or repair projects.

Compatible with many classic GM pickups from 1957–1988, this bulb holder is an ideal choice for enthusiasts looking to maintain factory functionality while improving reliability. Whether you're refreshing a vintage dashboard or solving dim/intermittent lighting issues, this component delivers a secure fit and dependable performance.

Key Features & Benefits:

• 5/8" quarter-turn design for easy, secure installation
• Direct-fit replacement for rectangular info block and heater control backlighting
• Wide compatibility with many GM trucks (1957–1988) and potentially other GM vehicles
• Supports factory 194 bulb size (compatible with both incandescent and LED options)
• Restores proper illumination for improved visibility and interior aesthetics
• Perfect for restorations, repairs, or upgrades

Bring your classic GM interior back to life with a simple, reliable lighting solution built to match original fitment and function.