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Service bulletin 20NA047

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 id10178968
Published by NHTSA2020-08-31
Manufacturer's number20NA047
Manufacturer's date2020-07-23
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION; EQUIPMENT

NHTSA's summary

This technical bulletin provides a service procedure to correct conditions of Front or Rear Crankshaft Oil Leak, MIL Illuminated with DTC P1101 Set.

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

Engine, Equipment and accessories, Engine oil and lubrication

Trouble codes named

P1101

Vehicles listed
BUICK ENCORE2016, 2017, 2018, 2019
CHEVROLET CRUZE2016, 2017, 2018, 2019
CHEVROLET EQUINOX2018, 2019, 2020
CHEVROLET MALIBU2016, 2017, 2018, 2019, 2020
CHEVROLET TRAX2019
CHEVROLET VOLT2016, 2017, 2018, 2019
GMC TERRAIN2018, 2019, 2020

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

Other bulletins for the same vehicles and component
22NA0092022-05-31. Service bulletin. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
16NA2222022-05-31. Service bulletin. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
18NA0332022-05-31. Service bulletin. This bulletin provides information for the low oil pressure light on at idle, which may be caused by oil pressure being bled off due to debris in the oil drain check valve and/or a smashed oil filter.
PIP5540G2021-04-19. Service bulletin. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
010601011L2021-03-01. Service bulletin. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.