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Service bulletin PIC-5652-B

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 id10054262
Published by NHTSA2014-01-06
Manufacturer's numberPIC-5652-B
Manufacturer's date2013-11-01
NHTSA componentVEHICLE SPEED CONTROL:ACCELERATOR PEDAL

NHTSA's summary

BUICK/CHEVROLET: THE MULTI-AXIS ACCELERATION SENSOR MODULE HAS DIAGNOSTIC TROUBLE CODE (DTC) U0121 (LOSS OF COMMUNICATION WITH EBCM) SET, WHEN PERFORMING DTC CHECK USING SCAN TOOL BY TECHNICIAN AND COMPONENTS OF THIS CONDITION NEED NOT BE REPLACED. MODEL 2013-2013 MALIBU, REGAL, LACROSSE. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Throttle and cruise control

Trouble codes named

U0121

Vehicles listed
BUICK LACROSSE2013
BUICK REGAL2013, 2014
CHEVROLET MALIBU2013, 2014

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
10-08-110-001L2025-02-11. Service bulletin. This service bulletin provides information on proper use of floor mats.
130089004H2023-12-11. Service bulletin. Car and Truck Fix it Right the First Time Issues
PIC6014A2023-04-17. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have the door locks will unlock immediately after auto locking usually at startup or while driving. Technician will need to remove power from the Sensing and Diagnostic Module. If doors no longer unlock unwanted the Sensing and Diagnostic Module should be replaced.
PIT5569A2019-08-12. Service bulletin. This Preliminary information communicates direction and examples when diagnosing multiple DTCs, one of which includes U**** Byte 71 DTC.
PIT5195B2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.
PIP5043B2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have a grind growl noise on the 1-2 shift that can be felt in the clutch pedal and brake pedal if applied during a 1-2 shift under light or normal acceleration. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.
PI1036A2016-06-22. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.