There are 7 choices

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amplifier
- 12 speaker system (opt UQS)
- 7 speaker system (opt UQA)
control panel
- control panel only
receiver
- opt IOK
- opt IOR
  - ID 85773660
  - ID 86537685
  - ID 86785721

Radio / CD Player / GPS for 2025 GMC Sierra 3500 HD

Fits: receiver opt IOR ID 85773660 (change)

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