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Electronic Control Module
- (left hand front under battery)
  - diesel
  - gasoline
Fuel Injection Control
- (6.6L turbo diesel)
  - (on Passenger Side valve cover)
Throttle Control
- (left hand firewall)

Engine Computer for 2002 GMC Sierra 3500

Fits: Fuel Injection Control 6.6L turbo diesel on Passenger Side valve cover (change)

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