There are 15 choices

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Automatic Transmission
- 4x2
  - diesel
    - 3500 HD
    - Excluding 3500 HD
  - gasoline
    - 5.7L
    - 7.4L
      - 3500 HD
      - Excluding 3500 HD
- 4x4
  - diesel
  - gasoline
    - 5.7L
    - 7.4L
Manual Transmission
- 4x2
  - 3500 HD
  - Excluding 3500 HD
    - diesel
    - gasoline
      - 8 Cyl, 350 cid (5.7L)
      - 8 Cyl, 454 cid (7.4L)
- 4x4
  - diesel
  - gasoline
    - 8 Cyl, 350 cid (5.7L)
    - 8 Cyl, 454 cid (7.4L)

Transmission Assembly for 1999 GMC K3500 Pickup

Fits: Automatic Transmission 4x2 gasoline 7.4L Excluding 3500 HD (change)

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