Get your headlights pointing straight again with the Dorman - HELP Headlight Adjusting Screw 42119. This direct-fit replacement threads into the headlight assembly to set and hold beam aim, and it drops in across a wide range of GM cars, trucks, and vans — including the 1975-1976 Buick Century, 1985-1994 Chevrolet Astro, 1976-1986 Chevrolet C10, 1988-1999 Chevrolet C1500, 1982-1994 Chevrolet S10, and 1995-2000 Chevrolet Tahoe. With 110 total applications, see the Buyer's Guide tab for the full list.
- Aim control: turning the screw moves the headlight so the beam can be set to the correct position.
- Direct-fit replacement: swaps in for a stripped, seized, corroded, or broken original adjusting screw.
- Wide GM coverage: fits many Buick, Chevrolet, and GMC models spanning the mid-1970s through the early 2000s.
If a damaged or stripped adjusting screw is keeping your headlight from holding its aim, this part provides a fresh, correctly threaded fastener so the aim can be adjusted again.
Interchange: 15705372 · 343555 · 362379 · 365266 · 365270 · 9438150 · 421192
Manufacturer part number 42119
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this headlight adjusting screw do?
It threads into the headlight assembly and lets you set and hold the beam aim; turning the screw moves the headlight so the beam points to the correct position.
How do I know my adjusting screw needs replacing?
Signs it may need replacing include a headlight that won't hold its aim or an adjusting screw that is stripped, seized, corroded, or broken.
Will this fit my vehicle?
It's a direct-fit replacement across 110 GM applications, including many Buick, Chevrolet, and GMC models. Check the Buyer's Guide tab to confirm your exact year, make, and model.
What interchange numbers does it replace?
It replaces interchange numbers 15705372, 343555, 362379, 365266, 365270, 9438150, and 421192. Its own manufacturer part number is 42119.
Does installing this screw aim my headlights?
It provides the adjustable fastener needed to set the aim. If a bad screw was preventing adjustment, this replaces it; the headlight still needs to be aimed to spec after installation.
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