# Service bulletins for the 2025 Peterbilt 536

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

29 bulletins from NHTSA, as of 2026-10-19.

- [42\-070](/bulletins/11038569.md), 2026-10-17, Service bulletin: UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- [P001](/bulletins/11037541.md), 2026-09-29, Service bulletin: ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
- [24KWC/24PBC](/bulletins/11036296.md), 2026-08-20, Service bulletin: STEERING. Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
- [24KWL/PBL](/bulletins/11036291.md), 2026-08-20, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS. The verbiage in the Introduction section has been updated.
- [43\-080](/bulletins/11033918.md), 2026-06-17, Service bulletin: ELECTRICAL SYSTEM. "KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note boxes for clear instructions."
- [02\-177](/bulletins/11033351.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM. Troubleshooting procedures for 2.1m cab power windows are now available.
- [14\-034](/bulletins/11032290.md), 2026-05-06, Service bulletin: UNKNOWN OR OTHER. Bogie Crossmember Torque Value Update \- Procedure has been updated to correct torque values.
- [24KWF/PBF](/bulletins/11030937.md), 2026-04-07, Service bulletin: STEERING. Sheppard Recall Update March 2026 \- The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
- [45\-069](/bulletins/11029787.md), 2026-03-05, Service bulletin: ENGINE. Cummins TSB 210203 has been updated to remove the PACCAR suction side fuel filter part number from Table 1 as the filter is no longer compatible.
- [25PACF](/bulletins/11027067.md), 2026-01-06, Service bulletin: EXTERIOR LIGHTING. Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control Unit \(VECU\) part number Q21\-1157\-013\-011 / Q21\-1157\-013\-013 / Q21\-1157\-002\-002 / Q21\-1157\-004\-004 / Q21\-1157\-006\-006 / Q21\-1157\-009\-009. See attached Parts Matrix for required parts per chassis.
- [25KWB/25PBB](/bulletins/11027057.md), 2026-01-06, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM. A new Recommended Repair has been added. It must be used if safety recall 25PACF is performed prior to or at the same time as this repair since the 25PACF remedy also satisfies this safety recall.
- [25PACF](/bulletins/11022490.md), 2025-09-03, Service campaign: EXTERIOR LIGHTING. Procedures are now available for Phase 1 chassis equipped with Internal Combustion Engines \(ICE\) and Vehicle Electronic Control Unit \(VECU\) part number Q21\-1157\-013\-011 / Q21\-1157\-013\-013. Parts and procedures for Phase 2 chassis will be available at a later date. This bulletin will be updated at that time. Please refer to the condition section for more details. Certain Ethernet Multiplexed Architecture \(EMUX\) chassis fail to conform to Federal and Canada Motor Vehicle Safety Standards \(FMVSS/CMVSS\) No. 108. Delayed or unsteady illumination of the vehicle’s stop lamps, reverse lamps, turn signal lamps and inadvertent change in headlamp illumination or lift axle position may"
- [24PBJ](/bulletins/11021490.md), 2025-08-05, Service bulletin: POWER TRAIN; SUSPENSION. "Safety Recall Parts and repair procedures are now available. Certain Meritor 10\-16K and 18\-23K Front Steer Drive Axles may have insufficient wheel bearing grease. Insufficient lubrication in the wheel bearing may cause the wheel hub to overheat and become damaged, which may increase the risk of a crash or thermal event . The driver may hear noise, excessive steering play, and/or smoke from the front wheel.
- [25PBB](/bulletins/11016628.md), 2025-04-04, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Safety Recall The Exterior Lighting Switch \(ELS\) in certain Model 535, 536, 537, 548, and 567 chassis may not function and can be reset only by a key cycle. This issue may result in non\-compliance with FMVSS/CMVSS 101 and 108. Affected chassis must have the Vehicle Soft ware updated.
- [43\-080 PB](/bulletins/11016473.md), 2025-04-04, Service campaign: ELECTRICAL SYSTEM. As of 03/25/2025, this campaign has resumed. Software updates are now available to complete this campaign.
- [T020 \- PB](/bulletins/11016468.md), 2025-04-04, Service bulletin: POWER TRAIN. Fix\-As\-Fail Certain Model 535, 536, 537, and 548 chassis equipped with a PACCAR TX\-8 transmission received transmission software with an incorrect variable. This software issue may cause DTC 521215\-2 to set, the Transmission Dash Light to Illuminate, and shifting to be restricted. A software update is now available to fix the issue. Fix\-as\-Fail start date: 03/19/2025.
- [25PBB](/bulletins/11014765.md), 2025-03-04, Other: EXTERIOR LIGHTING; ELECTRICAL SYSTEM. "Safety Recall – Interim Notification The Exterior Lighting Switch \(ELS\) in certain Model 535, 536, 537, 548, and 567 chassis may not function and can be reset only by a key cycle. This issue may result in non\-compliance with US Federal Motor Vehicle Safety Standards \(FMVSS\) or Canadian Motor Vehicle Safety Standards \(CMVSS\) 101 and 108. This bulletin will be updated when software and programming procedures are available."
- [24PBL](/bulletins/11013775.md), 2025-02-05, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Safety Recall Updated software and procedures are now available. Certain Vehicle Model Year 2021\-2025 Peterbilt chassis configured for trailer towing require a software update for the Bendix EC80 ABS ECU. Software update procedures for certain Battery\-Electric Vehicles \(BEV\) and EC80 ABS ECU part numbers are not yet available. This bulletin will be updated when software update procedures are available for these chassis. Safety Recall publish date: 1/10/25
- [24PBJ](/bulletins/11012372.md), 2025-01-07, Service bulletin: STEERING; WHEELS. INTERIM Safety Recall Certain Meritor 10\-16K and 18\-23K Front Steer Drive Axles may have insuffi cient wheel bearing grease. Insuffi cientlubricati on in the wheel bearing may cause the wheel hub to overheat and become damaged, which may increasethe risk of fi re. The driver may hear noise, excessive steering play, and/or smoke from front wheel. INTERIM Safety Recall start date: 12/12/2024
- [24KWGD/24PBGD](/bulletins/11007666.md), 2024-09-10, Service bulletin: STEERING. This bulletin contains secondary inspection procedures and part replacement procedures for tie\-rods identified as SUSPECT under 24PBGB ONLY. Certain chassis that have completed 24PBGB inspection with “GOOD” results but have not filed warranty claims to close out the campaign in SIR will need to file a claim and close out 24PBGD. Secondary inspection and replacement procedures are now available through this bulletin for parts found to be SUSPECT in the 24PBGB Safety Recall. Customers will be advised NOT TO DRIVE TRUCKS until this remedy is completed.
- [24KWG/24PBGC](/bulletins/11007665.md), 2024-09-10, Service bulletin: STEERING. Safety Recall Campaign start date: 6/17/2024 This bulletin contains secondary inspection procedures and part replacement procedures for drag links identified as SUSPECT under 24PBGA ONLY. Certain chassis that have completed 24PBGA inspection with “GOOD” results but have not fi led warranty claims to close out the campaign in SIR will need to fi le a claim and close out 24PBGC. Secondary inspection and replacement procedures are now available through this bulletin for parts found to be SUSPECT in the 24PBGA Safety Recall. Customers will be advised NOT TO DRIVE TRUCKS until this remedy is completed.
- [24PBGD](/bulletins/11005568.md), 2024-08-03, Service bulletin: STEERING. This bulletin contains secondary inspection procedures and part replacement procedures for tie\-rods identified as SUSPECT under 24PBGB ONLY. Certain chassis that have completed 24PBGB inspection with “GOOD” results but have not filed warranty claims to close out the campaign in SIR will need to file a claim and close out 24PBGD. Secondary inspection and replacement procedures are now available through this bulletin for parts found to be SUSPECT in the 24PBGB Safety Recall. Customers will be advised NOT TO DRIVE TRUCKS until this remedy is completed.
- [24PBF](/bulletins/11005555.md), 2024-08-02, Service bulletin: STEERING. SAFETY RECALL Repair parts and procedures are now available. Certain Peterbilt vehicles from Model Year 2025 may contain steering gear\(s\) with sector shaft gear teeth that may prematurely wear, crack, or fracture and interfere with the steering gear mechanism. This may lead to steering gear binding, which may increase the risk of a crash.
- [24KWGB/24PBGB](/bulletins/11003073.md), 2024-07-03, Service bulletin: STEERING. Safety Recall Certain model year 2025 Peterbilt 220, 536, 537, 548, 567, 579, and 589 chassis may have a tie\-rod with a ball stud that does not meet hardness specification. The ball stud may fracture, leading to a loss of steering and reduced vehicle control, increasing the risk of a crash. Customers will be advised NOT TO DRIVE TRUCKS until the remedy is completed.
- [24KWGA/24PBGA](/bulletins/11003071.md), 2024-07-03, Service bulletin: STEERING. Safety Recall Certain model year 2025 Peterbilt 536, 537, and 548 vehicles may have a drag link with a ball stud that does not meet hardness specification. The ball stud may fracture, leading to a loss of steering and reduced vehicle control, increasing the risk of a crash. Customers will be advised NOT TO DRIVE TRUCKS until the remedy is completed.

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