Dorman 42122 Headlight Adjusting Screw

Headlight Adjusting Screw for OE-Style Alignment

Dorman 42122 is a specific-fit headlight adjusting screw built to match the fit and function of the original hardware on listed vehicles. It is made from metal and plastic materials for dependable adjustment and secure attachment on sealed beam headlight assemblies.

For classic Buick, Cadillac, and Pontiac applications, this headlight adjusting screw helps restore proper beam aim after service or replacement. The Dorman 42122 part number is a direct-reference option for owners searching for a headlight adjusting screw for 1968-1979 Buick Skylark, Pontiac GTO, or Cadillac DeVille applications.

Key Features

• Specific-fit headlight adjusting screw for listed vehicles
• Designed for sealed beam headlight systems
• Adjustable design for headlight aiming
• Screw-on attachment method
• Constructed from metal and plastic materials
• Direct-reference part number: 42122

Vehicle Fitment

• Fits 1975-1979 Buick Skylark, N/A
• Fits 1969-1972 Buick Skylark, N/A
• Fits 1973-1975 Pontiac Grand Am, N/A
• Fits 1975 Pontiac Grand LeMans, N/A
• Fits 1973-1975 Pontiac Grand Prix, N/A
• Fits 1969-1975 Pontiac LeMans, N/A
• Fits 1973-1974 Buick Century, N/A
• Fits 1969-1974 Buick LeSabre, N/A
• Fits 1970-1974 Buick Riviera, N/A
• Fits 1969-1974 Cadillac DeVille, N/A
• Fits 1969-1974 Cadillac Eldorado, N/A
• Fits 1969-1974 Cadillac Fleetwood, N/A
• Fits 1969-1973 Pontiac Bonneville, N/A
• Fits 1969-1973 Pontiac Catalina, N/A
• Fits 1969-1973 Pontiac Firebird, N/A
• Fits 1969-1971 Pontiac GTO, N/A
• Fits 1969 Pontiac Tempest, N/A
• Fits 1968 Pontiac GTO, N/A

Common Problems This Part Can Address

• Broken or missing headlight adjustment hardware
• Loose headlight aim after front-end service
• Difficulty setting sealed beam headlight alignment
• Worn original screw threads or damaged adjusters
• Uneven headlight beam position on classic vehicles

Installation Notes and Tips

Use this screw on sealed beam headlight assemblies only where the vehicle listing confirms fitment. Compare the original adjuster style, thread engagement, and mounting location before installation. Because installation hardware is not included, reuse or source any additional mounting components required by the headlight assembly.

For best results, adjust headlight aim after installation and verify beam height against the vehicle’s service specifications. This part is commonly searched as a headlight adjusting screw for 1969-1974 Cadillac DeVille, 1969-1973 Pontiac Firebird, and 1975 Buick Skylark applications.

Quality Assurance

Dorman designs this replacement part to match the original part’s fit and function on specified vehicles. The construction uses quality materials for reliable performance in classic headlight adjustment applications. This part cross-references 1235816 for the same application.