The alternator type you have selected is the 33SI J-180 (4" mount) design

Please review the alternators presented below and then select the proper application for your vehicle's engine.

33SI hinge mount alternator

DATA BOX

In order to make the exact choice, please be sure to answer the following questions about your application:

  1. Does your alternator have the same dimensions as shown?
  2. What is the voltage of your vehicle system? It has to be either 12 or 24.
  3. What is the amperage output of the alternator being replaced?

Click here to review the newest design Delco 35SI type 140 amp or Delco 36SI type 170 amp unit that will interchange with the 12 volt alternator selection listed below. 35SI / 36SI alternators are designed for better under-the-hood heat resistance and are both equipped with the Delco style voltage seek terminal.

Match the details from your alternator with those noted below (such as system voltage, amp output and etc.), determine the correct alternator from our selection and click on the part number for exact unit picture and data.
Alternator Type Vehicle System Voltage Amperage Output Part Number
33SI 12 140 3312140
33SI 24 100 3324100

If you care to double check your selection using an OEM number, please enter it. Our program will also allow you to make a search with partial numbers, as long as you enter any four of the numbers or letters in a row.

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The OEM match will take you to our exact replacement for your unit.

If you are still not sure of the selection, please call
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and a technician will immediately assist you!

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