With this tuning added into your package, your 48RE automatic transmission truck will be able to run a PacBrake exhaust brake directly off the ECM without an external controller.
- 2004-2007 Auto Trans Trucks
- Automatic 4-3 downshift
- Brake will work down to about 15mph with manual downshift to 2nd
- Instructions Included for brake/ECM connection and wiring diagram
*This is for ECM control added into your tuning package. You will need to separately purchase and install a PacBrake with all associated components such as wiring/relays and Air Compressor.