20TS-09
Service Bulletin/Repair Instructions
Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
20TS-09
Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
0609-19
Service Information Bulletin for Symptom Diagnostics - Fluid in the Aftertreatment - Diesel Fuel Contamination.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.