NHTSA Service Bulletin 11002736: 2023-2025 Kalyn Siebert Hsa
Official manufacturer communication context for 2023-2025 Kalyn Siebert Hsa, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
Kalyn Siebert recently identified an unexpected crack on a beam of an uncompleted galvanized slider. After a thorough investigation, we believe that our steel supplier delivered a batch of flange material with a hardness and ultimate yield strength higher than called out in our specification. While this would not create a problem on a painted trailer, steel's ultimate yield strength and hardness are important factors in the galvanizing process. Extremely hard steel can become brittle during the process of galvanization, which ultimately created a crack on one of our trailers. However, we do not believe any trailers in the field are impacted by this issue. If there was an issue it likely would have presented itself at the time of galvanization. Late-stage failures (more than several hours after the process of galvanization) are extremely rare and are often the result of unrelated factors. Despite our confidence that fielded trailers are not at risk, we encourage end users in possession of the following serial numbers to conduct a simple visual inspection for cracks at the locations identified.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11002736?
Kalyn Siebert recently identified an unexpected crack on a beam of an uncompleted galvanized slider. After a thorough investigation, we believe that our steel supplier delivered a batch of flange material with a hardness and ultimate yield strength higher than called out in our specification. While this would not create a problem on a painted trailer, steel's ultimate yield strength and hardness are important.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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