E-TRON D335HD Distributor Cap

Description:
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:
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Buick, Oldsmobile, and Pontiac models from 1977–1979
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Some listings extend compatibility to GM 6-cylinder engines up to 1989
🛠️ Restoration Notes
Given your knack for authenticity and preservation:
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This cap is ideal for period-correct restorations where maintaining OEM ignition architecture is key.
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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
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1990 P40 Base
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1989 P20 Base Stripped Chassis
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1989 P40 Base
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1988 P20 Base Stripped Chassis
GMC
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1989 P2500 Base Stripped Chassis
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1988 P3500 Base Stripped Chassis
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1988 R2500 Base / High Sierra / Sierra Classic Crew Cab Pickup
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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