Software Problems of Buick Lacrosse

2018 Buick Lacrosse. Consumer writes in regards to vehicle shutting off suddenly. The consumer stated the battery was replaced, but the failure recurred. The dealer updated the software , but could not guarantee the failure would not recur.

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Vehicle completely dead after all types of electrical messages displayed when trying to start. Car was stationary both times. This first happened early Feb 2016; then repeated similar scenario 20 days later. Car was towed both times. Low mileage 52,278 miles. Messages generic, dealer could not determine problem and contacted the gm customer center also. Nothing done first time. Second time dealer started updating all the electronic modules-although again no specific cause and effect could be identified. Modules updated (ebcm, bcm ecm, etc. About 27 modules. Thus far car has not been dead again with exception of battery issue (already another warranty replacement for original). My concern: if these electronic modules (couple thousand of dollars) are the problem, how come it was not a recall vs repair. Owner should not be a hostage to a software update for a repair to make the car start? of note; my car has had 21 warranty fixes with my low mileage. Gm prior to this electronic failure extended my warranty out due to the many issues after I was forceful. Basically, gm engineers are producing a car where they cannot definitively state the problem, but start trying everything. These module updates would cost couple thousand dollars and lots of time in shop. Note: my auto is a 4 wd larger engine Buick; fob vs key so somewhat fewer on the road. My auto was one of the first 2011 that rolled off assembly line probably but very similar to the 2010 (first year out with the current body style). The other 21 warranty jobs (driver seat, passenger side traffic warning message, oil leaks, transmission leak at same time as engine oil leak, problems with doors opening, radio nav system, right rear hub bearing pad, and a couple driven by the actual repair visit.

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Defroster,heat,a/c,fan speed,recirc, heat/cool seats functions failed (stopped working completly) while driving in a snow storm on January 12, 2016 on highway us 131 to traverse city, mi. Found recall information NHTSA # 11v149000. Brought to dealer. Dealer said not coverred under recal due to VIN #, and owner cost of $400 + to repair. Contacted Buick customer care. Spoke with asia and leslie on 1/15/16, who said gm could not help. I described language of the recall as being identical to the safety hazard described in the NHTSA language: "windshield defrosting and defogging systems" on these vehicles, the software in the electronic climate control module may disable the ability to adjust the heating, ventilation, and air conditioning system settings. If this happens, the driver will not be able to control the cooling and ventilation for the vehicle. Consequence: if this condition affects the defrost system when it is required, it may decrease the driver's visibility and could result in a crash. ".