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Service bulletin PI1521

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 id10113800
Published by NHTSA2017-08-15
Manufacturer's numberPI1521
Manufacturer's date2015-08-10
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; STEERING; POWER TRAIN

NHTSA's summary

This preliminary informational bulletin provides repair information to correct a customer concern of loss of power steering assist, hard to steer, and/or "Service Power Steering" message on in DIC.

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, Labels and manuals, Steering, Transmission and driveline

Vehicles listed
BUICK LACROSSE2013, 2014, 2015, 2016
BUICK REGAL2013, 2014, 2015, 2016
BUICK VERANO2012, 2013, 2014, 2015
CADILLAC ELR2014, 2015
CHEVROLET CRUZE2011, 2012, 2013, 2014, 2015
CHEVROLET EQUINOX2010, 2011, 2012, 2013, 2014, 2015, 2016
CHEVROLET IMPALA2014, 2015, 2016
CHEVROLET MALIBU2013, 2014, 2015, 2016
CHEVROLET VOLT2011, 2012, 2013, 2014, 2015
GMC TERRAIN2010, 2011, 2012, 2013, 2014, 2015, 2016

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

Recalls for the same vehicles and component
20183202018-06-14. Powertrain
16V5020002016-07-05. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
20163412016-06-30. Powertrain
16V4490002016-06-21. EQUIPMENT:OTHER:LABELS; TIRES
20163122016-06-17. Label
16V1080002016-02-24. STEERING:ELECTRIC POWER ASSIST SYSTEM
20160862016-02-22. Steering
15V4420002015-07-10. STEERING
20153032015-07-06. Steering
15V2450002015-04-24. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
13-02-32-001H2025-05-06. Service bulletin. This service bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures.
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
16-NA-1092025-02-28. Service bulletin. This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
09-06-04-026Z2025-01-23. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
08-07-30-035I2024-12-19. Service bulletin. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
04-06-01-029K2024-12-04. Service bulletin. This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
24-NA-2232024-11-19. Service bulletin. This service bulletin informs the technician of an alternate lift procedure that has been developed when the lift plate does not fit the top of the transmission case for 6T30, 6T35, 6T40, 6T45, and 6T50 Transmissions.
20-NA-1382024-11-05. Service bulletin. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
08-07-30-026I2024-10-24. Service bulletin. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.