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TRAILBLAZER
- Electronic Control Module
  - (left hand engine)
TRAILBLAZER EXT
- Electronic Control Module
  - 4.2L (left hand engine)
  - 5.3L (next to air box)
- Throttle Control
  - (left hand firewall)
    - (5.3L)

Engine Computer for 2003 Chevrolet Trailblazer

Fits: TRAILBLAZER EXT Electronic Control Module 4.2L left hand engine (change)

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