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SUBURBAN 1500
- Automatic Transmission
  - 4x2
    - (TH700, opt MD8)
      - diesel
      - gasoline
        ECM equipped
        Without ECM equipped
  - 4x4
    - (TH700, opt MD8)
      - diesel
      - gasoline
SUBURBAN 2500
- Automatic Transmission
  - 4x2
    - 4L80E (opt Manual Transmission1)
    - TH700 (opt MD8)
      - diesel
      - gasoline
        ECU equipped
        Without ECU equipped
  - 4x4
    - 4L80E (opt Manual Transmission1)
    - TH700 (opt MD8)
      - diesel
      - gasoline

Transmission Assembly for 1991 GMC Suburban

Fits: SUBURBAN 1500 Automatic Transmission 4x4 TH700, opt MD8 diesel (change)

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