Heavy Duty Alternator

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Support   Core Identification   Alternator Core Identification   21SI 22SI Core Identification

21SITM and 22SITM Alternator Core Identification

Use this page to help identify the correct core group for your core returns.  If you know the part number, please visit our e-catalog for model family idenfication.

21SI Alternator Core


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21SI rear cover without name.

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21SI casting smooth side.
 
 

22SI Alternator Core


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22SI rear cover with name.


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21SI casting smooth side.
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DELCO REMY is a registered trademark of General Motors LLC, licensed to PHINIA Technologies Inc.
Copyright © 2024 PHINIA Inc. All rights reserved.
DELCO REMY is a registered trademark of General Motors LLC, licensed to PHINIA Technologies Inc.