Some owners of select GM vehicles may comment on a low brake pedal during braking. See the application list at the end of this bulletin.
Some owners of 2011 Buick Regal vehicles equipped with a 2.4L engine may complain of an engine oil leak that appeared in extremely cold ambient temperatures (generally 0 degrees Fahrenheit or colder). They may also comment that they heard a single “pop” noise immediately before the oil leak started.
This bulletin applies to 2011 Buick Regal models equipped with the 6T40/45 automatic transmission, built on or before Jan. 15, 2011.
Owners of 2010-2014 Buick LaCrosse and 2014 Regal GS AWD models may comment on a squeak or chirp noise from the rear of the vehicle, noticeable at low speeds with the window open. This is likely a squeak at the axle-to-seal interface due to a lack of lubrication.
Owners of 2011-2012 Buick Regal models (equipped with variable assist power steering) may complain that the steering wheel is difficult to turn at low speeds. The cause may be a variable effort power steering solenoid valve connector that was installed backward/reversed at the rack and pinion connector on the frame.
This bulletin applies to 2010-2013 Buick Regal models, in addition to a number of 2009-2013 GM vehicles. The vehicle may experience a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperatures.
Some customers may comment on a fluid leak under the front of the GM vehicle. The technician may find fluid leaking from the power steering system.
This bulletin applies to 2012-2013 Buick Regal and Lacrosse vehicles with eAssist. A hum or buzz noise may be heard from the right front service brake when driving straight or when turning, along with a Service Brake Assist message displayed, and DTCs C027B or C0040.
This bulletin applies to 2012-2013 Buick Regal models equipped with eAssist. A buzz or hum may be heard in the right front, possibly when turning or driving straight. The ABS MIL may be on or Service Brake Assist message may be displayed. DTCs C027B or C0040 may be stored.
This bulletin applies to 2011-2012 Buick Regal and 2010-2012 LaCrosse vehicles equipped with variable assist power steering.
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