DR49 D577 Ignition Coil & Module for Chevrolet GMC 4.3L 5.7L 1995-2007

Product Overview

This aftermarket replacement ignition coil and module is intended for the listed 1995-2007 Chevrolet and GMC 4.3L and 5.7L applications and cross-references part numbers DR49 and D577. An ignition coil and module assembly delivers the high-voltage spark needed to ignite the air-fuel mixture in a gasoline engine's combustion chamber. It is supplied as a replacement component for the corresponding ignition system position.

Key Features & Performance

• Provides the high-voltage output required to fire the spark plug in a distributor-based ignition system.
• Module controls coil dwell and trigger timing based on the ignition signal.
• Cross-references part numbers DR49 and D577 for comparison with the existing component.
• Intended for the listed 1995-2007 Chevrolet and GMC 4.3L and 5.7L applications.
• Used when servicing or replacing a failed coil and module assembly.

Fitment & Compatibility

• for 1995-2007 Chevrolet applications with 4.3L engines
• for 1995-2007 Chevrolet applications with 5.7L engines
• for 1995-2007 GMC applications with 4.3L engines
• for 1995-2007 GMC applications with 5.7L engines

Common Uses

• Replacing a failed or misfiring ignition coil and module assembly.
• Restoring normal ignition function after a no-start or rough-running condition traced to the coil or module.
• Routine ignition system servicing on the listed applications.

Technical Specifications

• Product Type: Ignition Coil and Module
• Part Number(s): DR49, D577
• Model Application(s): 1995-2007 Chevrolet and GMC
• Engine Application(s): 4.3L, 5.7L

Frequently Asked Questions

Q: What does an ignition coil and module do? A: The coil steps up battery voltage to the high voltage needed to create a spark, while the module controls the timing of that spark in a distributor-based ignition system.

Q: How do I verify fitment? A: Compare the part numbers on your existing coil and module with DR49 and D577, and confirm the year, make, and engine size of your vehicle match the listed 1995-2007 Chevrolet or GMC 4.3L and 5.7L applications.

This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.