NHTSA service bulletin

NHTSA Service Bulletin 613606: 1998 Chevrolet C6500

Official manufacturer communication context for 1998 Chevrolet C6500, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 613606 summary graphic for 1998 Chevrolet C6500
613606NHTSA document ID
Manufacturer communicationcommunication type
8affected product rows
90/100quality 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

ON SOME MEDIUM DUTY TRUCKS EQUIPPED WITH A DIESEL ENGINE, AIR BRAKES, AND THE ENGINE SHUTDOWN FEATURE, THE MULTI-FUNCTION ALARM MODULE MAY NOT PERFORM CERTAIN FEATURES SUCH AS: NO WARNING TONE FOR AIR BRAKE LOW PRESSURE; NO WARNING TONE FOR CHECK GAGES; NO LOW COOLANT TELLTALE LAMP OR WARNING TONE; AND NO ENGINE SHUTDOWN FUNCTION FOR LOW COOLANT OR LOW OIL PRESSURE OR HIGH COOLANT TEMPERATURE. **MR

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
ChevroletC65001998Ask for service records and run the exact VIN before purchase.
ChevroletC75001998Ask for service records and run the exact VIN before purchase.
ChevroletT65001998Ask for service records and run the exact VIN before purchase.
ChevroletT75001998Ask for service records and run the exact VIN before purchase.
GMCC65001998Ask for service records and run the exact VIN before purchase.
GMCC75001998Ask for service records and run the exact VIN before purchase.
GMCT65001998Ask for service records and run the exact VIN before purchase.
GMCT75001998Ask 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 613606?

ON SOME MEDIUM DUTY TRUCKS EQUIPPED WITH A DIESEL ENGINE, AIR BRAKES, AND THE ENGINE SHUTDOWN FEATURE, THE MULTI-FUNCTION ALARM MODULE MAY NOT PERFORM CERTAIN FEATURES SUCH AS: NO WARNING TONE FOR AIR BRAKE LOW PRESSURE; NO WARNING TONE FOR CHECK GAGES; NO LOW COOLANT TELLTALE LAMP OR WARNING TONE; AND NO ENGINE SHUTDOWN FUNCTION FOR LOW COOLANT OR LOW OIL PRESSURE OR HIGH COOLANT TEMPERATURE. **MR

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.

Get Full Report