Dorman 42125 Headlight Adjusting Screw

Headlight Adjusting Screw for OE-Style Alignment

Dorman 42125 is a specific-fit headlight adjusting screw engineered to match the fit and function of the original part on listed vehicles. Built from metal and plastic materials, it provides a direct replacement solution for sealed beam headlight adjustment on compatible applications.

This part cross-references 421252 and 1235816 for the same application.

Key Features

• Specific-fit replacement for listed vehicle applications
• Designed for sealed beam headlight systems
• Adjustable screw-on attachment method
• Constructed from metal and plastic materials
• Direct replacement for headlight aiming and alignment service
• Part number 42125 for catalog and service reference

Detailed Description

Dorman 42125 is a headlight adjusting screw made to match the original part’s fit and function on specified vehicles. It is designed for sealed beam headlight assemblies and uses a screw-on attachment method for adjustment during headlamp service. For restorations and repairs on classic Buick, Cadillac, and Pontiac models, this OE-style replacement supports accurate headlight positioning when the original adjuster is worn, damaged, or missing. The 42125 part number is also useful when cross-checking service records or ordering by reference.

Compatible With 1968-1979 Buick Skylark, 1973-1974 Buick Century, 1970-1974 Buick LeSabre, 1970-1974 Buick Riviera, 1969-1974 Cadillac DeVille, 1969-1974 Cadillac Eldorado, 1969-1974 Cadillac Fleetwood, 1969-1975 Pontiac LeMans, 1973-1975 Pontiac Grand Am, 1973-1975 Pontiac Grand Prix, and other listed Buick, Cadillac, and Pontiac applications. Part number 42125 also appears in service searches for classic GM headlight adjustment repair.

Common Problems It Helps Solve

• Headlight aim that cannot be adjusted properly
• Broken or missing original adjusting screw
• Loose headlamp alignment after service
• Worn adjustment hardware on sealed beam headlights
• Restoration work requiring the correct replacement adjuster

Installation Notes and Tips

• Verify the vehicle’s headlight style before ordering; this part is for sealed beam headlight applications.
• Match the original adjuster location and thread engagement before final headlamp aiming.
• Inspect surrounding headlight hardware for wear or damage during installation.
• Use the vehicle’s service procedure to set beam height and alignment after replacement.

Quality Assurance

Dorman manufactures this replacement part to match original fit and function on the listed vehicles. The combination of OE-style application coverage, specific fitment, and durable material selection supports dependable headlight adjustment service.