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BUICK, CADILLAC, CHEVROLET, GEO, GMC

21-NA-124

Manufacturer communications

Publication date
2022-12-14
Received by NHTSA
2023-01-06
NHTSA record numbers
10228888

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 1500 HD2003
ChevroletSILVERADO 1500 HD2002
ChevroletSILVERADO 1500 HD2001
ChevroletSILVERADO 25002023
ChevroletSILVERADO 25002022
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
ChevroletSILVERADO 25002006
ChevroletSILVERADO 25002005
ChevroletSILVERADO 25002004
ChevroletSILVERADO 25002003
ChevroletSILVERADO 25002002
ChevroletSILVERADO 25002001
ChevroletSILVERADO 25002000
ChevroletSILVERADO 35002023
ChevroletSILVERADO 35002022
ChevroletSILVERADO 35002021

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