Fitment Guarantee·Free Shipping $50+·Hassle Free Returns
4.9· 19,069 customers|Fit guaranteed
4.9from 19,069 verified customers
|"Perfect fit, exactly what I needed!"— John D.
Dorman®Verified to fit 940 vehicles
| Vehicle | Trim | Engine | Notes |
|---|---|---|---|
| 1999 Cadillac Eldorado | — | V8 4.6L | w/2 Wires |
| 1998 Pontiac Firebird | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1997 Cadillac Eldorado | — | V8 4.6L | Bayonet Style Bulb; w/2 Wires |
| 1997 Chevrolet Astro | — | V6 4.3L | Bayonet Style Bulb; w/2 Wires |
| 1997 Oldsmobile 88 | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1997 Oldsmobile Regency | — | V6 3.8L | Compare w/Original Socket; w/2 Wires; Terminal Gender: Female |
| 1997 Oldsmobile Regency | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1996 Buick LeSabre | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1996 Chevrolet Camaro | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1996 Chevrolet Camaro | — | V8 5.7L | Bayonet Style Bulb; w/2 Wires |
| 1996 Chevrolet Caprice | — | V8 5.7L | Bayonet Style Bulb; w/2 Wires |
| 1996 Chevrolet Corsica | — | L4 2.2L | Bayonet Style Bulb; w/2 Wires |
| 1995 Buick LeSabre | — | V6 3.8L | Bayonet Style Bulb; w/2 Wires |
| 1995 Cadillac Seville | — | V8 4.6L | w/2 Wires |
| 1995 Chevrolet Caprice | — | V8 4.3L | Bayonet Style Bulb; w/2 Wires |
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, known to the State of California to cause cancer and reproductive harm. Service the vehicle in a well-ventilated area, wear gloves, and wash your hands. See www.P65Warnings.ca.gov/motor-vehicle-parts
Guaranteed fit — or free return
Currently out of stock
If a part we confirmed for your vehicle does not fit, we cover the return shipping and refund you in full. That is the fitment guarantee.
Nobody likes buying a part that turns out to be wrong. So if it doesn't fit, send it back for a full refund at no cost to you — return shipping is on us — and we'll help you get the right one.
Every part is covered for 24 months. Many brands add their own manufacturer warranty on top.
Ratings come from verified AutoBuffy buyers after delivery — no imported or paid reviews.
The brand behind your
Socket Assembly
Dorman builds this Socket Assembly to original-equipment standards.
We do not list every part on earth — just the brands automakers actually trust. And we use AI to double-check not just the fitment but the product details on every listing, because we hate buying the wrong part as much as you do.
Top curated brands only
The brands automakers actually put on the car. No white-label mystery boxes.
We're obsessed with fitment
Year, make, model, trim, engine — plus the fine print most sites skip — so it fits the first time.
Search any part number
The number off your old part, a competitor listing, or the dealer part — we cross it and confirm the match.
Dorman Socket Assembly 85866
Out of stock · guaranteed fit or free return
Checking fitment…
Shipping calculated at checkout · Est. arrival Wed, Nov 4 to Wed, Nov 4
Ships To:This Dorman automotive component is engineered to meet or exceed OEM specifications for reliable performance and long service life.
Trusted Automotive Brand
Dorman is a trusted manufacturer of quality automotive parts.
View all Dorman productsThe brand behind your
Socket Assembly
Dorman builds this Socket Assembly to original-equipment standards.
The Dorman Socket Assembly (85866) is a direct-fit replacement for 1976-1999 Chevrolet, Buick, Oldsmobile and 6 other makes. UPC 037495858663.
Socket Assembly
The Dorman Socket Assembly (85866) is a direct-fit replacement for 1976-1999 Chevrolet, Buick, Oldsmobile and 6 other makes. UPC 037495858663.
This Dorman automotive component is engineered to meet or exceed OEM specifications for reliable performance and long service life.
We only sell brands automakers trust, and we double-check the fit on every listing.
Top curated brands only
The brands automakers put on the car.
Obsessed with fitment
Year, make, model, trim, engine, plus the fine print.
Search any part number
Your old part, a competitor, or the dealer #. We confirm the match.
Shop owner? Get BuffyPro business pricing
Fitment Obsessed
Every part checked against your exact year, make, model, trim, and engine.
Wrong Fit? On Us.
Free return shipping, no restocking fee — the fitment guarantee.
Brands OEMs Trust
The names automakers actually put on the car.
Millions of Parts, One Promise
If we say it fits, it fits.
