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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)
    - ID YFKB
    - ID YFKD
    - ID YFKF
    - ID YFKH
    - ID YFKJ
    - ID YFKX
    - ID YFKY
    - ID YFPZ
    - ID YFXL
    - ID YFXM
    - ID YFXN
    - ID YFXP
    - ID YFYY
    - ID YHRA
    - ID YHTN
- Throttle Control
  - (left hand firewall)
    - (5.3L)

Engine Computer for 2004 Chevrolet Trailblazer

Fits: TRAILBLAZER EXT Electronic Control Module 5.3L next to air box ID YFXN (change)

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