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BUICK, CADILLAC, CHEVROLET, GMC

21NA124

Manufacturer communications

Publication date
2021-05-25
Received by NHTSA
2021-07-06
NHTSA record numbers
10198890 · 10199281

Multiple filings of the same bulletin are grouped here; original record numbers remain available.

Manufacturer summary

Original wording in English

This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.

NHTSA manufacturer communications ↗

Reported code forms

P0442P0455

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 15002018
ChevroletSILVERADO 15002017
ChevroletSILVERADO 15002014
ChevroletSILVERADO 15002013
ChevroletSILVERADO 15002012
ChevroletSILVERADO 15002011
ChevroletSILVERADO 15002010
ChevroletSILVERADO 15002009
ChevroletSILVERADO 15002008
ChevroletSILVERADO 15002007
ChevroletSILVERADO 15002006
ChevroletSILVERADO 1500 HD2005
ChevroletSILVERADO 1500 HD2004
ChevroletSILVERADO 1500 HD2003
ChevroletSILVERADO 1500 HD2002
ChevroletSILVERADO 25002021
ChevroletSILVERADO 25002020
ChevroletSILVERADO 25002019
ChevroletSILVERADO 25002018
ChevroletSILVERADO 25002017
ChevroletSILVERADO 25002016
ChevroletSILVERADO 25002015
ChevroletSILVERADO 25002014
ChevroletSILVERADO 25002013
ChevroletSILVERADO 25002012
ChevroletSILVERADO 25002011
ChevroletSILVERADO 25002010
ChevroletSILVERADO 25002009
ChevroletSILVERADO 25002008
ChevroletSILVERADO 25002007

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