Bully Dog 4161x 4-Bank 6-Position Chip - Manual (Page 9)

8
inSTAllATiOn STePS
removIng the ecu from underneath the dash early ’99-‘03
In these steps you will remove the ECU from underneath the dash.
IMPORTANT: The steps on this page are for Early ’99-’03 7.3L model vehicles.
1. Disconnect the battery.
2. Locate the back side of the ECU on the fire-
wall closest to the wheel-well in the engine
bay.
3. There is a 10mm bolt that needs to be re-
moved from the back side of the ECU. The
10mm bolt is located in the center of the
housing.
4. Go inside the cab of the vehicle.
5. Locate the ECU underneath the left dash
flush against the outside frame.
6. Remove two 7 mm bolts that hold the ECU
in place inside the cab. If there are cables
connected to the ECU with plastic rivets you
will need to disconnect them.
7. Slide the ECU towards the passenger side of
the vehicle and back for easier removal.
7MM B
olt
7MM B
olt
10 MM B
olt
Back side of the ECU
ECU inside of the cab
Note: On vehicles with standard transmissions you will need to press the clutch in all the way in order to
remove the ECU. Ensure that the vehicle is on a flat surface and the parking brake in on before taking the
vehicle out of gear.