NHTSA service bulletin

NHTSA Service Bulletin 10190748: Cummins B Gas Plus

Official manufacturer communication context for model years not specified Cummins B Gas Plus, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10190748 summary graphic for model years not specified Cummins B Gas Plus
10190748NHTSA document ID
Technical service bulletincommunication type
10affected product rows
83/100quality score

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

This Technical Service Bulletin desribes the troubleshooting steps to diagnose natural gas leaks into the engine cooling system. Many natural gas fuel systems use engine coolant to warm the natural gas high pressure regulator and/or heat exchanger. A leaking original equipment manufacturer (OEM) high pressurer fuel system component can cause natural gas to leak into the engine cooling system. This is an update to a previously submitted communication.

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

MakeModelModel yearsBuyer note
CumminsB Gas Plusmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsB5.9 Gmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsC Gas Plusmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsC8.3gmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsIsb5.9 Gmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsIsc8.3model years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsL Gas Plusmodel years not specifiedAsk for service records and run the exact VIN before purchase.
CumminsL10model years not specifiedAsk for service records and run the exact VIN before purchase.
Cummins WestportIsl Gmodel years not specifiedAsk for service records and run the exact VIN before purchase.
Cummins WestportIsx12 Gmodel years not specifiedAsk for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 10190748?

This Technical Service Bulletin desribes the troubleshooting steps to diagnose natural gas leaks into the engine cooling system. Many natural gas fuel systems use engine coolant to warm the natural gas high pressure regulator and/or heat exchanger. A leaking original equipment manufacturer (OEM) high pressurer fuel system component can cause natural gas to leak into the engine cooling system. This is an update to a.

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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