Recalls and bulletins
No NHTSA safety recall in our pull names this engine, and we document 9 manufacturer bulletins, programs or coverages tied to its known failures. Each entry shows the campaign number, the model years, what was wrong and what the fix is.
Newest first. NHTSA's own summary and remedy text, for the models and years this engine was sold in.
No NHTSA safety recall in our pull names this engine. That does not rule out recalls on the rest of the truck (brakes, airbags, bodies), which this engine registry leaves out; check the VIN at NHTSA.
Manufacturer service bulletins, special coverages, programs and emissions recalls that bear on this engine's documented failures. Identifier, date and scope only; bulletin text is the manufacturer's.
This engineering informational bulletin is requesting information for vehicles that has had the fuel injection pump replaced and is still within warranty.
Failure mode: Bosch CP4.2 high-pressure pump failure and fuel-system contamination
a malfunction-indicator light (MIL) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (DEF) tank reservoir or increased DEF tank-heater resistance. ... This special coverage covers the condition described above for a period of 10 years or 120,000 miles
Failure mode: DEF system failures: tank heater, dosing, quality (LML)
Technician may find Diagnostic Trouble Code DTCs P0087, P0088, P0191 or P128E. ... If the current Service Information diagnostic has led to Fuel Injection Pump replacement, Fuel Pressure Regulator 1 must be inspected for magnetic metal debris.
Failure mode: Bosch CP4.2 high-pressure pump failure and fuel-system contamination
ON SOME ... VEHICLES THAT ARE EQUIPPED WITH A 6.6L DIESEL ENGINE (LML/LGH), A MALFUNCTION-INDICATOR LIGHT (MIL) MAY ILLUMINATE DUE TO AN OFFSET IN THE TEMPERATURE SENSOR IN THE DIESEL-EMISSION-REDUCTION FLUID (DEF) TANK RESERVOIR, INCREASED TANK-HEATER RESISTANCE, OR REDUCTANT-SYSTEM PERFORMANCE. DEALERS ARE TO REPLACE THE DEF TANK RESERVOIR AND/OR SUPPLY MODULE PUMP.
Failure mode: DEF system failures: tank heater, dosing, quality (LML)
MAY HAVE A CONDITION WHERE THE INDIRECT FUEL INJECTOR CAN BECOME STUCK IN THE CLOSED POSITION OR CAN HAVE LOW FLOW. ... DEALERS ARE TO REPLACE THE INDIRECT FUEL INJECTOR AS NECESSARY WITH AN IMPROVED SERVICE PART.
Failure mode: DPF regeneration service (retained system)
may contain a leak in the seal between the engine-exhaust down pipe and the engine-exhaust pipe. If a leak is present, the intermittent regeneration of the diesel-particulate filter may cause small amounts of diesel fuel to leak from the vehicle. It may also cause diesel-fuel vapor and engine exhaust to enter the passenger cabin.
Failure mode: DPF regeneration service (retained system)
the 6.6L Duramax Diesel Engine Fuel Injection Pump Part numbers 12645102, 12658095 and 12661059 will be placed on a parts restriction through the General Motors Product Quality Center.
Failure mode: Bosch CP4.2 high-pressure pump failure and fuel-system contamination
Duramax Fuel System Contamination Identification. ... If during the inspection of the fuel system contamination is found the complete fuel system will need to be cleaned and flushed.
Failure mode: Bosch CP4.2 high-pressure pump failure and fuel-system contamination
GM: DURAMAX DIESEL HARD START, NO START, OR DTC P0087 INJECTION PUMP REPLACEMENT. NORMAL SI DIAGNOSTICS MAY BE INCONCLUSIVE OR LEAD TO A FUEL INJECTION PUMP REPLACEMENT.
Failure mode: Bosch CP4.2 high-pressure pump failure and fuel-system contamination
Method: safety recalls come from NHTSA's recall database, pulled for every make, model and year this engine covers; a recall is listed when its NHTSA text names this engine (fuel type, displacement or engine family) and left out when it names no engine. Defect investigations come from NHTSA's investigations file by the same rule, or when the investigation cites a recall listed here. Bulletins and programs come from the failure-mode records on this site, each with its source. Pulled 2026-10-26. How we tier and source facts.