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Electronic Control Module
- Base (4AFE engine, opt L01, VIN 6, 8th digit)
  - California
  - Federal
- GSi (4AGE engine)
  - California
  - Federal
- LSi (4AFE engine, opt L01, VIN 6, 8th digit)
  - California
  - Federal

Engine Computer for 1991 Geo Prizm

Fits: Electronic Control Module GSi 4AGE engine California (change)

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