Handling R-134a and R-1234yf refrigerants

August 1, 2026

Vehicle air conditioning systems require proper refrigerant handling during upfitting and service operations. This article outlines important EPA requirements, technician certification expectations, and best practices for working with today's commonly used refrigerants while maintaining compliance and protecting equipment.

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Record retention and additional NHTSA reporting requirements for final-stage manufacturers or alterers

Vehicle certification responsibilities don’t necessarily end when an upfitted vehicle leaves the shop. This article examines important NHTSA record retention and reporting requirements affecting final-stage manufacturers...

September 1, 2026

Vehicle Certification

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Tire and loading info label (vehicle placard) vs. load carrying capacity modification label

Vehicle upfitting can affect tire, loading, and cargo capacity information provided to operators—but determining which label is required depends on the type of vehicle and modifications performed. This article explains...

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Vehicle Upfitting Considerations

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F/CMVSS 206: Door Locks and Door Retention Components

Modifying or adding vehicle doors can introduce important safety and certification considerations for work truck upfitters. This article examines Federal/Canada Motor Vehicle Safety Standard (F/CMVSS) 206, including when...

September 1, 2026

Federal Motor Vehicle Safety Standard (FMVSS) Guidance

Handling R-134a and R-1234yf refrigerants

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Record retention and additional NHTSA reporting requirements for final-stage manufacturers or alterers

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