2023 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.
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Aug 13, 2026 Service bulletinThe verbiage in the Introduction section has been updated.
• Jun 3, 2026 Service bulletinKW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The...
• May 6, 2026 Service bulletinTroubleshooting procedures for 2.1m cab power windows are now available.
• Apr 16, 2026 Service bulletinBogie Crossmember Torque Value Update
• Mar 3, 2026 Service bulletinSheppard Recall Order Process Update
• Feb 11, 2026 Service bulletinThe Parts section has been updated to clarify that freight charges for safety recall orders should not be...
• 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...
• Nov 26, 2025 Service campaignThe right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector
• Aug 1, 2025 Service campaignProcedures are now available for Phase 1 chassis equipped with Internal Combustion Engines (ICE) and...
• Apr 2, 2025 Service bulletinCertain Model 535/536/537/548 may have an oversized magnet carrier in the throttle pedal assembly, which may
• Mar 26, 2025 Service campaignAs of 03/25/2025, this campaign has resumed
• Jan 30, 2025 Service bulletinSafety Recall – Interim Notification Certain vehicles may have an oversized magnet carrier in the throttle...
• Jan 10, 2025 Service bulletinSafety Recall Updated software and procedures are now available
• Nov 22, 2024 Service bulletinInfo Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
• May 16, 2024 Service bulletinOn certain Peterbilt, New Medium Duty chassis that are equipped with the optional engine intake air...
• May 16, 2024 Service bulletinInformation Only New tools are required to support PACCAR TX-8 / ZF transmissions
• Apr 19, 2024 Service bulletinCARB Emission s Manufacturer Warranty term and/or kilometers conversion displayed in certain EMY 2022-2023...
• Mar 25, 2024 Service bulletinInterim
• Feb 13, 2024 Service bulletinSafety recall
• Dec 22, 2023 Service bulletinCertain 536, 537, 548, and 567 chassis built with 2.1m Medium Duty End of Frame Trailer Connections and...
• Oct 23, 2023 Service bulletinCertain 536, 537, and 548 chassis built with 2.1m Medium Duty End of Frame Trailer Connections may exceed...
• Aug 21, 2023 Service bulletinSafety Recall Certain vehicles built with TX-8 transmissions with flange mounted yokes may not have a...
• May 3, 2023 Service bulletinSafety Recall The brake pedal plunger which connects the brake pedal to the brake valve may dislodge after...
• Mar 22, 2023 Service bulletinRFID (Radio Frequency ID) tags are being added and used to track Non-Test Ready (NTR) trucks to...
• Nov 1, 2022 Service bulletinPeterbilt SmartLINQ subscriptions can be renewed online via PACCAR Solutions RemoteDiagnostics web portal.
• Oct 19, 2022 Service bulletinThis is a follow-up bulletin to shortage bulletin S017
• Oct 18, 2022 Service bulletinInfo Only
• Aug 3, 2022 Service bulletinThe service information for Bendix Air Dryer maintenance is being updated to include new procedures.