There are 12 choices

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SIERRA DENALI 1500
- (Automatic Transmission)
  - 4x2
    - 5.3L
    - 6.2L
  - 4x4
    - 5.3L
    - 6.2L
SIERRA DENALI 2500
- (Automatic Transmission)
  - 6.0L
    - 4x2
    - 4x4
  - 6.6L
    - 4x2
    - 4x4
SIERRA DENALI 3500
- (Automatic Transmission)
  - 6.0L
    - 4x2
    - 4x4
  - 6.6L
    - 4x2
    - 4x4

Transmission Assembly for 2018 GMC Sierra Denali

Fits: SIERRA DENALI 1500 Automatic Transmission 4x4 5.3L (change)

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