| Subject: | New Power Take-Off (PTO) Option Programming Information and Procedures |
| Models: | 2004*-2006 Chevrolet Kodiak C6500-C8500 Series Medium Duty |
| 2004*-2006 GMC TopKick C6500-C8500 Series Medium Duty |
| 2004*-2006 Chevrolet F-Model T-Series Medium Duty Tilt Cab |
| 2004*-2006 GMC F-Model T-Series Medium Duty Tilt Cab |
| 2004*-2006 Isuzu FTR/FVR/FXR/HTR/HVR/HXR Commercial Medium Duty |
New PTO Option Programming procedures have been added to GM Service Information (SI). These new procedures will aid the technician when Option Programming is necessary.
The PTO Option Programming must be done when any of the following procedures are performed:
| • | When the upfitter installs a PTO system. |
| • | When the ECM is replaced. |
| • | When a change of the PTO setting is needed. |
Detailed information for this new procedure can be found in GM SI under sub-section [Engine - Engine Controls 7.8L - Repair Instructions - Options Programming].
