There are 10 choices

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4.3L
- Automatic Transmission
- Manual Transmission
4.8L
- Automatic Transmission
- Manual Transmission
5.3L
- hybrid option (opt HP2)
  - generator control
  - main
- Without hybrid option
6.0L
- core is 1-1/8" thick
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
- core is 1-5/16" thick

Radiator Assembly for 2006 GMC Sierra 1500 HD

Fits: 4.3L Manual Transmission (change)

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