ES1001BK AF42701100 12V Alternator 1 Groove for GM 327 350 396 427 454 1971-1986

Product Overview

This aftermarket replacement alternator is listed for GM 327, 350, 396, 427, and 454 applications from 1971-1986 and references part number ES1001BK and AF42701100. An alternator generates electrical current to charge the battery and supply the vehicle electrical system while the engine is running.

Key Features & Performance

• Alternator role is to produce electrical current for battery charging and vehicle electrical loads
• 12V configuration as stated in the title
• One-groove pulley arrangement as described in the listing
• Cross-references part numbers ES1001BK and AF42701100 for comparison with the existing unit
• Supplied for replacement of the corresponding alternator when the original component has failed

Fitment & Compatibility

• for GM 327 applications from 1971-1986
• for GM 350 applications from 1971-1986
• for GM 396 applications from 1971-1986
• for GM 427 applications from 1971-1986
• for GM 454 applications from 1971-1986

Common Uses

• Replacing a worn, damaged, or malfunctioning alternator
• Servicing the charging system during routine maintenance
• Restoring normal charging function after the original alternator has failed

Technical Specifications

• Product Type: Alternator
• Part Number(s): ES1001BK, AF42701100
• Voltage: 12V
• Pulley: 1 Groove
• Engine Application(s): GM 327, 350, 396, 427, 454
• General Application: 1971-1986

Frequently Asked Questions

Q: What does an alternator do? A: It generates electrical current while the engine runs to charge the battery and power the vehicle electrical system.

Q: How should fitment be verified? A: Compare the complete part numbers ES1001BK and AF42701100 with the existing alternator and confirm the full engine designation and year match the listed application.

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.