There are 18 choices

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Automatic Transmission
- 4x2
  - 4L80E (opt Manual Transmission1)
    - diesel
    - gasoline
      - 4.3L
      - 5.7L
        ID BAP
        ID BBP
      - 7.4L
  - TH700 (opt MD8)
    - diesel
    - gasoline
- 4x4
  - 4L80E (opt Manual Transmission1)
  - TH700 (opt MD8)
    - diesel
    - gasoline
Manual Transmission
- 4 speed
  - 4x2
  - 4x4
- 5 speed
  - 4x2
    - integral bell housing
    - Without integral bell housing
      - diesel
      - gasoline
  - 4x4
    - integral bell housing
    - Without integral bell housing
      - diesel
      - gasoline

Transmission Assembly for 1991 GMC K2500 Pickup

Fits: Automatic Transmission 4x2 TH700 opt MD8 gasoline (change)

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