2021 Peterbilt 548 technical service bulletins
29 technical service bulletins and manufacturer communications cover the 2021 Peterbilt 548.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- The verbiage in the Introduction section has been updated.
- KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The...
- Troubleshooting procedures for 2.1m cab power windows are now available.
- Bogie Crossmember Torque Value Update
- The Parts section has been updated to clarify that freight charges for safety recall orders should not be...
- Cummins TSB 210203 has been updated to remove the PACCAR suction side fuel filter part number from Table 1...
- The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector
- As of 03/25/2025, this campaign has resumed
- Safety Recall Updated software and procedures are now available
- Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
- On certain Peterbilt, New Medium Duty chassis that are equipped with the optional engine intake air...
- Information Only New tools are required to support PACCAR TX-8 / ZF transmissions
- Interim
- Certain 536, 537, 548, and 567 chassis built with 2.1m Medium Duty End of Frame Trailer Connections and...
- Certain 536, 537, and 548 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may exceed...
- Safety Recall The brake pedal plunger which connects the brake pedal to the brake valve may dislodge after...
- This campaign is the final opportunity to replace the oil filter screw cap to reduce occurrences of broken...
- Info Only
- The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
- Chassis with a PACCAR TX-8 transmission without cruise control may have active transmission faults 86-2...
- Info Only
- Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
- Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines,...
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
- Information Only
- Safety Recall
- A vinyl camouflage wrap was applied to new model 536, 537, and 548 cabs built during the validation phase...
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