# Service bulletin PB\-15766

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10074771
- Published by NHTSA: 2016\-06\-22
- Manufacturer's number: PB\-15766
- Manufacturer's date: 2015\-10\-01
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)

## NHTSA's summary

SUMMARY TO BE PROVIDED ON A FUTURE DATE.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Engine, Exhaust and emissions, EGR valve

## Vehicles listed

- 2015 CHEVROLET SILVERADO 2500
- 2015 GMC SIERRA 2500

## Other bulletins for the same vehicles and component

- [08\-06\-04\-003D](/bulletins/10190379.md), 2021-04-20, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\); EQUIPMENT. New Tool Availability — EN\-48974 – EGR Cooler Pressure Tester Adapter Set to Diagnose Duramax® Diesel Engine EGR Cooler Engine Coolant Leaks into Combustion Chamber
- [08\-06\-04\-003C](/bulletins/10138703.md), 2018-05-29, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\). This informational bulletin advises of a new testing tool for EGR cooling pressure tester.
- [17\-NA\-161](/bulletins/10137657.md), 2018-05-21, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\). This technical bulletin provides a procedure for exhaust gas recirculation valve pipe replacement \(EGR Bypass Pipe\) due to the EGR cooler bypass pipe being crack.
- [PIP5198A](/bulletins/10112162.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\); ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:WIRING. This Preliminary Information communication provides information to the technician about vehicles that may have Service messages in the Driver Information Center, Malfunction Indicator Lamp on, Erratic fluctuating engine oil pressure gauge, engine crank no start, and engine may run rough or misfire. Technician may find Diagnostic Trouble Codes. Technician should use published Service Information diagnostics for the Diagnostic Trouble Codes that are set. If the diagnosis does not lead to a resolution check for chafing of the engine wiring harness that is routed near the Exhaust Gas Recirculation Valve. Technician should repair any damaged wiring and fully seat the wire retaining harness. Also the technician should bend the Exhaust Gas Recirculation Valve gasket over to prevent a re\-occurrence.
- [16\-NA\-212](/bulletins/10089001.md), 2017-01-18, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\); EQUIPMENT. THIS INFORMATION BULLETIN PROVIDE INFORMATION ON A NEW WAY TO LOOK AT NOX SENSOR READINGS AND EXHAUST TEMPERATURE DURING A DPF REGENERATION OR A REDUCTANT FLUID QUALITY TEST.
- [SB\-080604003\-C](/bulletins/10056354.md), 2014-11-08, Service bulletin: ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\). GMC/CHEVROLET: ENGINES, WITH EGR SYSTEM, HAS LEAKAGE FROM EGR COOLER ENGINE COOLANT INTO THE COMBUSTION CHAMBER. MODEL 2002\-15 SILVERADO, SIERRA, 2004\-09 KODIAK C4500\-C5500, TOPKICK C4500\-C5500, 2006\-15 EXPRESS, SAVANA. \*PE

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