Home21NA124 · BUICK, CADILLAC, CHEVROLET, GMC
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
Chevrolet35002020
Chevrolet35002019
Chevrolet35002018
Chevrolet35002016
Chevrolet45002017
Chevrolet4500HD2021
Chevrolet4500HD2020
Chevrolet4500HD2019
Chevrolet4500HD2018
Chevrolet4500HD2017
Chevrolet5500HD2021
Chevrolet5500HD2020
Chevrolet5500HD2019
Chevrolet5500HD2018
Chevrolet5500HD2017
ChevroletALERO EXPORT2002
ChevroletALERO EXPORT2001
ChevroletALERO EXPORT2000
ChevroletASTRO2005
ChevroletASTRO2004
ChevroletASTRO2003
ChevroletASTRO2002
ChevroletASTRO2001
ChevroletASTRO2000
ChevroletAVALANCHE2013
ChevroletAVALANCHE2012
ChevroletAVALANCHE2011
ChevroletAVALANCHE2010
ChevroletAVALANCHE2009
ChevroletAVALANCHE2008

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