OEM PART NUMBERS — GM:
• GM OEM: 1894308
• GM OEM: 1894485
OEM PART NUMBERS — AC DELCO / DELCO REMY:
• AC Delco: D1918
• Delco Remy: D-1918
INDUSTRY CROSS-REFERENCES:
• Industry: DM1918
• Industry: LX331
• Industry: CBE1004
• Other Names: HEI Ignition Control Module
• Other Names: Ignition Module
• Other Names: 5-Pin HEI Module
• Other Names: EST Module (Electronic Spark Timing)
• Other Names: HEI/EST Module
• Other Names: GM HEI Module
• Other Names: Distributor Ignition Module
• Other Names: Chevy HEI Module
• Other Names: Cadillac Ignition Module
• Other Names: Buick HEI Module
PRODUCT SPECIFICATIONS:
• Product Type: HEI Ignition Control Module
• Unit Type: GM 5-Pin HEI/EST System
• Configuration: 3/2 Pin (5 Pins Total)
• Ignition System: High Energy Ignition (HEI)
• Feature: Electronic Spark Timing (EST) Capable
• Mounting: Internal Distributor-Mounted
• Application Era: 1978-1986 Pre-OBD GM Vehicles
• Condition: New Aftermarket Replacement
• Quantity: Sold Individually (1 Piece)
• Product Fit: Direct Fit OEM Replacement
• Installation: Direct Bolt-In to Distributor
• Recommended Use: OE Replacement
• Compliance: SAE / OEM-Spec Certified
HEI SYSTEM CONTEXT:
• GM Introduced 5-Pin HEI Module in 1978
• Evolution from 4-Pin HEI (1974-1981)
• 5-Pin Added EST (Electronic Spark Timing)
• Predecessor to 7-Pin ESC/EMR
• Standard on GM V6/V8 Carbureted Engines 1978-1986
CRITICAL FITMENT NOTES:
• For 5-Pin HEI/EST Distributor ONLY
• Does NOT Fit 4-Pin HEI (LX301 / D1906)
• Does NOT Fit 7-Pin ESC/EMR
• Does NOT Fit Vortec ICM (1996+ DM579)
• Does NOT Fit LS-Series Coil-On-Plug
• Count Pins on Original Module First
• Verify OEM Part Number Before Ordering
WHAT IS NOT INCLUDED:
• Mounting Screws / Hardware
• Heat Sink Paste
• Distributor Cap or Rotor
• Ignition Coil
• Pickup Coil
• Spark Plug Wires
• Installation Instructions
SYMPTOMS OF FAILURE:
• Engine Will Not Start / No Spark
• Engine Cranks But Does Not Fire
• Engine Stalls After Starting
• Intermittent Stalling When Hot
• Engine Misfire / Rough Running
• Hard Starting — Hot Soak Issue
• Engine Cuts Out at Highway Speeds
• Complete Ignition System Failure
APPLICATION SUMMARY:
• 1978-1981 Buick LeSabre / Regal / Riviera
• 1978-1984 Cadillac DeVille / Eldorado / Fleetwood / Seville / Commercial
• 1980-1986 Chevrolet C/K Pickup / Blazer / Suburban / G Van / Astro / Monte Carlo
• 1981-1986 GMC C/K Pickup / Jimmy / Suburban / G Van / Caballero / Safari
• 1980-1981 Pontiac Firebird / Bonneville / Grand Prix / LeMans / Parisienne
PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.
WARNING - This product may expose you to chemicals such as Carbon Black, Silica, Crystalline which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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