Service bulletin PIP5380

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.

NHTSA's summary

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY HAVE AN ENGINE THAT RUNS ROUGH, SHAKE AGGRESSIVELY, SMOKE FROM THE EXHAUST AND/OR KNOCK AT STARTUP. TECHNICIAN WILL RUN THE VEHICLE AND MONITOR FOR MISFIRES, ROUGH RUNNING, EXCESSIVE EXHAUST SMOKE, OR KNOCK NOISE. REMOVE ALL SPARK PLUGS AND REPLACE ANY SHOWING SIGNS OF FUEL FOULING. TECHNICIAN WILL RUN THE VEHICLE TILL OPERATING TEMPERATURE. THEN THE VEHICLE WILL NEED TO COLD SOAK, AFTER THAT RECHECK FOR MISFIRES, ROUGH RUNNING, AND EXCESSIVE EXHAUST SMOKE AND/OR KNOCK NOISE. IF EXCESSIVE SMOKE FROM THE EXHAUST PERSISTS, RECORD THE RESULTS OF THE FUEL SYSTEM DIAGNOSIS IN SERVICE INFORMATION ALSO CONTACT GENERAL MOTORS TECHNICAL ASSISTANCE CENTER. IF THE MISFIRE, ROUGH RUNNING, OR KNOCK NOISE PERSISTS THEN PERFORM STRATEGY-BASED DIAGNOSTICS ON THE SYMPTOM.

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, Crankcase ventilation (PCV)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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