Home15821 BULLETIN · CHEVROLET, GMC
CHEVROLET, GMC

15821 BULLETIN

Manufacturer communications

Publication date
2016-06-03
Received by NHTSA
2017-01-23
NHTSA record numbers
10089319

Manufacturer summary

Original wording in English

15821 - SPECIAL COVERAGE. A MALFUNCTION INDICATOR LAMP (MIL) MAY ILLUMINATE WITH DIAGNOSTIC TROUBLE CODE (DTC) P0420, CATALYST SYSTEM LOW EFFICIENCY, STORED. THIS COULD OCCUR AS A RESULT OF AN EXHAUST LEAK AT THE CONNECTION OF THE BANK 1 CATALYTIC CONVERTER OUTLET TO THE MUFFLER INLET PIPE. NO OTHER DTCS WILL BE STORED. THIS SPECIAL COVERAGE COVERS THE CONDITION DESCRIBED ABOVE FOR A PERIOD OF 8 YEARS OR 80,000 MILES (130,000 KM), WHICHEVER OCCURS FIRST, FROM THE DATE THE VEHICLE WAS ORIGINALLY PLACED IN SERVICE, REGARDLESS OF OWNERSHIP. DEALERS WILL REPLACE THE EXHAUST PIPE CLAMP.

NHTSA manufacturer communications ↗

Reported code forms

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
ChevroletSILVERADO 15002013
GMCSIERRA 15002013

Data coverage →