The below information was provided via an "AI" search - cross reference part numbers and look at pictures for verification - I have no idea except what an internet search provided - if you are not 100% certain this is the item you need - do not buy - sold as is where is - no returns. Overview The E-TRON D335HD is a high-durability electronic distributor cap designed for GM vehicles, specifically Buick, Oldsmobile, and Pontiac models from 1977 to 1979. It’s part of E-TRON’s line of ignition components aimed at maintaining OEM-level performance with modern reliability. 🧩 Key Specifications Attribute Details Brand E-TRON Part Number D335HD Interchange Number DR452X OEM Cross Reference GM1894979 Fitment GM 6-cylinder engines (1977–1989 range noted in some listings) Mounting Style Screw-on Material Copper terminals, plastic housing Performance Type Electronic ignition-compatible Vintage Part Yes — NOS (New Old Stock) Country of Manufacture United States Vehicle Compatibility While exact fitment should be verified per vehicle, the D335HD is commonly listed for: Buick, Oldsmobile, and Pontiac models from 1977–1979 Some listings extend compatibility to GM 6-cylinder engines up to 1989 🛠️ Restoration Notes Given your knack for authenticity and preservation: This cap is ideal for period-correct restorations where maintaining OEM ignition architecture is key. The copper terminals and screw-on mount suggest solid conductivity and secure fit — a plus for vintage drivetrains. Vehicle Compatibility for E-TRON D335HD Distributor Cap This cap fits GM 6-cylinder engines, particularly those using the 292 cu in (4.8L) inline-six with electronic ignition. Verified applications include: Chevrolet 1990 P40 Base 1989 P20 Base Stripped Chassis 1989 P40 Base 1988 P20 Base Stripped Chassis GMC 1989 P2500 Base Stripped Chassis 1988 P3500 Base Stripped Chassis 1988 R2500 Base / High Sierra / Sierra Classic Crew Cab Pickup 1988 V3500 Base / High Sierra / Sierra Classic (Cab & Chassis, Crew Cab, Standard Cab) These vehicles all share the 292 I6 OHV engine, making the D335HD a direct-fit NOS solution for restorers and fleet maintainers alike
