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Service bulletin CB21-J-001A

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10190786
Published by NHTSA2021-04-26
Manufacturer's numberCB21-J-001A
Manufacturer's date2021-03-26
NHTSA componentEQUIPMENT

NHTSA's summary

CONDITION IN SOME 2020MY ISUZU N-SERIES TRUCKS EQUIPPED WITH 6.6L L8T GASOLINE ENGINES, THE ORIGINAL EQUIPMENT ENGINE OIL DIPSTICKS WERE INCORRECTLY CALIBRATED AND THE INFORMATION IN THE VEHICLES' OWNER MANUAL REGARDING OIL CAPCITY DURING MAINTENANCE IS INACCURATE. AS A RESULT, IT IS DIFFICULT FOR TECHNICIANS TO REFIL, ADJUST AND MEASURE THE NEGINE OIL ELVEL ACCURATELY DURING VEHICLE MAINTENACE. CORRECTION ISUZU DEALERS WILL REPLACE THE ENGINE OIL DIPSTICK AND OWNER MANUAL SO THE ENGINE OIL LEVEL CAN BE SET CORRECTLY. (THE RELEVANT PAGES OF THE OWNER MANUAL REGARDING TEH SPECIFIED OIL LEVEL HAVE BEEN CORRECTED AND REPLACED.) THIS SERVICE WILL BE PROVIDED FREE OF CHARGE.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Vehicles listed
ISUZU N-SERIES2020

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