22PBA – Cab Entry Step May Unexpectedly Move – 2022 Peterbilt 579

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22PBA – Unintended Chassis Fairing Step Movement – NHTSA ID: 22V016, TC: 2022-010 Number 22PBA Supplier Dynacraft Description Unintended Chassis Fairing Step Movement – NHTSA ID: 22V016, TC: 2022-010 Date 2/1/2022 What’s New t1 Edit [j] Clone Safety Recall – Chassis Fairings with integrated cab step may become loose, allowing minor unintended movement and risk of injury while entering and exiting the cab. The repair procedure and parts information will be added when parts are available. Introduction Chassis Fairings with integrated cab step may become loose at one attachment point, allowing minor unintended movement and risk of injury while entering and exiting the cab. Situation 3,703 (3,511 US/ 192 Canada) Model 579 chassis model year 2021 vehicles built from 02/15/2021 through 11/05/2021 with chassis fairings. Resolution Safety Recall This bulletin will be updated with the repair procedure and parts information when parts are available. Federal Law It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has been corrected. Links Chassis List Authored by: PR

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22PBA – Unintended Chassis Fairing Step Movement – NHTSA ID: 22V016, TC: 2022-010 Number 22PBA Supplier Dynacraft Description Unintended Chassis Fairing Step Movement- NHTSA ID: 22V016, TC: 2022-010 Date 2/1/2022 What’s New 6′? Edit [cJ Clone Safety Recall – Chassis Fairings with integrated cab step may become loose, allowing minor unintended movement and risk of injury while entering and exiting the cab. The repair procedure and parts are now available to add support brackets to the fairing structure. Introduction Chassis Fairings with integrated cab step may become loose at one attachment point, allowing minor unintended movement and risk of injury while entering and exiting the cab. Situation 3,703 (3,511 US/ 192 Canada) Model 579 chassis model year 2021 vehicles built from 02/15/2021 through 11/05/2021 with chassis fairings. Resolution Safety Recall Service all affected chassis that enter your dealership, even if the customer has no issue with the chassis. 1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list. 2. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the “22PBA” campaign code prior to performing this repair. 3. Follow the procedures below to add the support bracket to the fairing structure. Federal Law It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has been corrected. Warranty There is no time or mileage limit for this recall. Peterbilt will pay for parts at dealer net plus applicable mark up and labor: • 0.4 hours labor to add the support bracket to the fairing structure for chassis shown to require the support bracket on one fairing – refer to the attached chassis list. Use Quick Claim Code 22PBAA. o If substitute screws are used (as described in the Parts Section) – the Quick Claims do not apply. A long form claim must be filed referencing the 22PBA campaign. • 0.8 hours labor to add the support bracket to the fairing structure for chassis shown to require the support bracket on two fairings – refer to the attached chassis list. Use Quick Claim Code 22PBAB. o If substitute screws are used (as described in the Parts Section) – the Quick Claims do not apply. A long form claim must be filed referencing the 22PBA campaign. • File an additional claim for extraordinary circumstances. A quick claim for standard labor must be filed first. • File the claim within 14 days in accordance with Warranty Policy. Take-Off Parts Disposition: Destroy parts 30 days after the claim has been paid. PRWS CLAIM CODING Campaign 22PBA Campaign Safety Recall Code: Type Claim Truck Repair Type Proactive Category: Customer 062 Causal Code Al Concern Code Corrective 12 Responsibility Camp Action Code: Code Failure 004- Causal Part N56-6010-100 Location 005- 003 Supplier N/A B22-PBA 0.4 hrs – Code SRT Code update one chassis fairing. Procedure Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained. See the attached Repair Procedure in the Links section. Parts Parts are available from PACCAR Parts. NOTE: Quantities listed are per fairing. Refer to the chassis list to determine how many fairings need to be serviced. Quantity Part Number Description 1 N11-6714 REINFORCEMENTLATCH FAIRING LH REINFORCEMENT- 1 N11-6714R LATCH FAIRING RH **R34-6002- SCREW M6 HEX 14 06025RHLZ (substitutes WSHR HEAD SELF available below) ALIGN (substitutes available below) BOLT-HEX M6- 2 K041-802-60CA 1.00X60 CL 10.9 CAD WASHER-FENDER 8 27-02043 RND 1/4X1X0.090 ss 10 W20-6011-06TDY0Z NUT-HEX LOCKING M6X1 .0 Loctite 243 – if needed with As **079340-43900 substitute fastener Needed as shown below. Source locally if needed ** If the preferred screw R34-6002-06025RHLZ is not available, R34-6002-06025SHLN may be used. If neither is available, R34-6002-06025RF0Z may be used with Loctite 243 (079340-43900) applied to the threads. A Long Form claim is required if either substitute screw is used. Links Chassis List Re1:1air Procedure US Customer Letter Canada Customer Letter Authored by: PR Revision History 3/24/2022 – Updated the bulletin to add repair, warranty and parts information.

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PETERBILT MOTORS COMPANY A ~ COMPANY 1700 WOOOBROOK STREET DENTON, TEXAS 76205-7864 940-591-4000 Recall Notice: 22PBA IMPORTANT SAFETY RECALL INFORMATION Issued in Accordance With Federal Law ***** NHTSA. ffl$T°CLASS Wf_ U.S.POSTAGE IWll ClEVflJI\O, OH Permlt ltl, 469 l1 P l 0001 il :a m ~ rr-z -.0.. n m IMPORTANT SAFETY RECALL April 8, 2022 Subject: Safety Recall: 22PBA- Unintended Chassis Fairing Step Movement NHTSA: 22V016 EXPIRATION DATE: NONE This notice applies to your vehicle. Your VIN(s) can be found on the bottom or back of this page. Dear Petert:>ilt Customer, This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Peterbilt has decided that a defect which relates to motor vehicle safety exists in certain Model 579 vehicles equipped with a cab step integrated into the chassis fairing. Chassis fairings may become loose at one attachment point, allowing minor unintended movement and risk of injury while entering and exiting the cab. What Is the problem? What wlll your deal11r do? What should you do? Chassis fairings with integrated cab step may become loose, allowing minor unintended movement, Your dealer will add a support bracket to reinforce the chassis fairing(s) and replace the hardware. Contact your dealer to schedule the repair. Peterbilt Motors Company has initiated this recall to remedy the issue with no charge to you. Please contact your Peterbih dealer to schedule an appointment for these services, To find your Petert:>lh dealer, please visit the Dealer Locator at www.Peterbilt.com or scan the QR code, When contacting your Peterbilt dealer, reference the Safety Recall number and the NHTSA number. This repair may take up to 1 hour of labor depending on dealer schedul ing. If you require further information about this recall, reimbursement of a pre-notification remedy associated with this recall, or experience any difficulty In making arrangements for this repair, please contact: Peterblh Motors Company, 1700 Woodbrook St, Denton, TX 76205, Attn: Customer Service Department. If you conclude that Petert:>ilt has not enabled you to remedy this defect in a reasonable time and without charge, you may submit a complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S,E., Washington, DC 20590, or call the toll free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days. If you no longer own this vehicle, we would appreciate your advising us of the new owner. Please send all known ownership and address changes to PBDiv.Warranty.Docs@paccar.com. We apologize for any inconvenience this preventive procedure may cause and thank you for your participation in helping Petert:>ilt provide the highest levels of customer satisfaction and service expertise. We value your business and appreciate your ongoing loyalty to Petert:>ilt and its dealer network. Industry-leading quality, performance and reliability are hallmarks of Peterbilt products, and we thank you for making Petert:>ilt your truck of choice. Sincerely, –iM.JL..?~ Michelle Ponsonby Director of Customer Service Peterbilt Motors Company Our records indicate that these vehides are affected by 22PBA and are owned by Scan this QR code to open the Peterolt Dealer Loc,itot. II

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-016 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : PACCAR Incorporated Submission Date : JAN 18, 2022 NHTSA Recall No. : 22V-016 Manufacturer Recall No. : 22PBA Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 3,511 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Peterbilt Model 579 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The population has unique part numbers that were searched to identify each configuration. The recall population includes all variants of fold out chassis fairings for the updated Model 579, not all model 579’s have chassis fairings. 3,511 vehicles will be recalled. Production Dates : FEB 15, 2021 – NOV 01, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Bolts that fasten the latches that hold the chassis fairing step assembly in a closed position, may loosen and could also cause their attachment rib to fracture. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A loose latch may cause unintended movement of the cab entry step assembly and can increase the risk of injury upon ingress or egress of the cab. Description of the Cause : Bolts did not have a torque retention feature to keep them tight, this allows a latch to become loose and may fracture the rib it was fastened through. Identification of Any Warning that can Occur : Drivers/Passengers may feel some unintended movement in the chassis fairing step assembly when entering or exiting the cab Involved Components : Part 573 Safety Recall Report 22V-016 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Step – Service Structure Component Description : Assembly structure that supports the chassis fairing Component Part Number : N82-6105-000 Supplier Identification : Component Manufacturer Name : PACCAR Address : NR NR Country : NR Chronology : 10/27/2021: Engineering communicated to Safety & Compliance that a fastener and bracket change were being implemented on chassis fairings in production. 11/7/2021: Engineering sent a trip report from a recent customer visit to Safety & Compliance regarding loosening bolts. 11/19/2021: Engineering released a longer term change to the molded fairing support structure for quotes. 12/1/2021: Safety & Compliance met with engineering for updates on design, field issues, etc. 12/16/2021: Safety & Compliance discussed the investigation with NHTSA during a quarterly meeting. 12/22/2021: Safety & Compliance confirms chassis list of possible affected vehicles. 12/23/2021: Evaluation performed on a truck in the lab with one latch removed in addition to a test drive. 12/29/2021: Field reported additional customer truck with a loose latch. 1/4/2022: Meeting held with partial Safety Committee in attendance. 1/6/2022: Second evaluation performed on a truck in lab by engineering 1/12/2022: Safety Committee agreed a safety related defect exists. Description of Remedy : Description of Remedy Program : Customers will have new fasteners and a bracket added to their current chassis fairing assemblies. Owners who incurred costs to obtain a remedy for the problem addressed by the recall in advance of receiving notification may seek reimbursement through the process outlined in the general reimbursement plan on file. How Remedy Component Differs The remedy components include new fasteners with “patch lock’ added to keep them securely fastened. There is also the addition of a bracket that Part 573 Safety Recall Report 22V-016 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 from Recalled Component : helps strengthen the area around the latch attachment with an additional three fasteners. Identify How/When Recall Condition was Corrected in Production : Interim correction began 10/27/2021 using bolts with torque retention feature and adding a bracket for reinforcement. Additional holes are drilled in step assembly structure to fasten this bracket in addition to fasteners that retain the latch through the bracket. Recall Schedule : Description of Recall Schedule : Customers will be notified within 60 days Planned Dealer Notification Date : MAR 19, 2022 – MAR 19, 2022 Planned Owner Notification Date : MAR 19, 2022 – MAR 19, 2022 * NR – Not Reported

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