Is it possible to get a service bulliten that details the exact updates that are performed? I won't update my computer without this kind of data, why should I update my car? My Volt advisor says that she does not have access to update data, but that I'd have to contact my dealer. Unfortunately, dealers are used to servicing PARTS, and give you a blank stare about software updates. Not in their realm...
Excuse me? Ummm no.
Actually your GM dealer is VERY familiar to performing these types of software updates as they have been doing it since the early 90s and probably do as many as 2-10 daily. (depending on the size of the dealer)
There IS an internal notice as to these updates but no external paperwork as all of the affected 2011 Volt owners are being contacted personally via telephone/Onstar.
This "Customer Satisfaction/Product Enhancement" update (aka Campaign 11137B) will perform specific operating system and calibration updates on the following modules (in programming sequence):
-Radio Module
-HVAC Module
-On-Board Charging Module
-Battery Energy Control Module
-Hybrid Powertrain Control Module 2
-Engine Control Module
-Power Inverter Control Module
-Body Control Module
*As part of the campaign they will also install a new fuse panel label under the LH rear compartment hatch to remedy a printing error.
About the only negative is that ALL of your current statistical baselines for EV and fuel range will be "reset". So assuming you are getting better than average EV/CD range estimates for a full charge they MAY appear to temporarily decrease until a new baseline can be established over 3-10 EV drive-charge cycles. Certain "personalizations" and radio presets will be lost as part of the procedure as well, but easily readjusted after the update.
These update will both improve vehicle operation as well as correct certain self-diagnostic routines making it less likely certain DTCs will set falsely. It is highly recommended that ALL 2011 Volts that are being contacted receive the updates.
If any 2011 owners haven’t been contacted and are uncertain if your Volt is affected, please call your dealer with your VIN and they can quickly determine if your Volt is slated for "Required Field Actions". Alternatively you could contact your Volt advisor and they should be able to tell you.
HTH
WopOnTour