2026 Peterbilt 548 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Nov 4, 2026 Service bulletinThe new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
• Oct 28, 2026 Service bulletinThere is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage...
• Oct 23, 2026 Service bulletinEaton service bulletin TAIB-1026 instructs dealers to update the master switch module (MSM) software
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Aug 13, 2026 Service bulletinUpdated Sheppard Steering Gear Classification Tool link in Inspection Procedure
• Aug 11, 2026 Service campaignAn improved transmission bracket is now available for replacement on certain chassis equipped with a...
• Jun 16, 2026 Service bulletinKw & pb
• Jun 13, 2026 Service bulletinThe repair procedure has been updated to include diagnostic steps.
• May 26, 2026 Service bulletinKW: A Transmission Control Module (TCM) software update is now available for certain T280, T380, T480,...
• May 6, 2026 Service bulletinTroubleshooting procedures for 2.1m cab power windows are now available.
• Apr 16, 2026 Service bulletinBogie Crossmember Torque Value Update
• Feb 3, 2026 Service bulletinCummins TSB 210203 has been updated to remove the PACCAR suction side fuel filter part number from Table 1...
• Dec 23, 2025 Service bulletinParts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control...
• Dec 10, 2025 Service bulletinA new Recommended Repair has been added
• Aug 14, 2025 Service campaignParts and repair procedures are now available
• Aug 1, 2025 Service campaignProcedures are now available for Phase 1 chassis equipped with Internal Combustion Engines (ICE) and...
• Jul 4, 2025 Service bulletinSafety Recall – Interim Notifi cation Interim bulletin chassis are now fl agged in the PACCAR Registration...
• Mar 20, 2025 Service bulletinFix-As-Fail Certain Model 535, 536, 537, and 548 chassis equipped with a PACCAR TX-8 transmission received...
• Mar 19, 2025 Service bulletinSafety Recall The Exterior Lighting Switch (ELS) in certain Model 535, 536, 537, 548, and 567 chassis may...
• Feb 11, 2025 OtherSafety Recall – Interim Notification The Exterior Lighting Switch (ELS) in certain Model 535, 536, 537,...