There are 5 choices

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SUBURBAN 1500
- Electronic Control Module
  - (left hand front under battery)
- Throttle Control
  - (left hand firewall)
SUBURBAN 2500
- Electronic Control Module
  - (left hand front under battery)
    - 6.0L
    - 8.1L
- Throttle Control
  - (left hand firewall)

Engine Computer for 2003 GMC Suburban

Fits: SUBURBAN 1500 Electronic Control Module left hand front under battery (change)

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