2013 Buick Lacrosse Eassist engine problems

“Well the belt tensioner and the hybrid motor Drive Motor Performance and Hybrid Power train Control Module Requested MIL Illumination Yes not just any mechanic can work on the car because of the hybrid system is to much voltage And the check engine light came on the car”

“The bolt that secures the Serpentine belt tensioner unit to the motor block has repeatedly snapped apart leaving the tensioner unit to dangle from the block. Not secured, which causes the belt to dislodge or break (both have happened) the spring is left to flail about as is the tensioner unit since it is no longer connected to the engine block. Not to say where the other half of the bolt could end up. So far each time it snaps in half the other half remains in the block. But the unit is no longer secured to the block. While driving when this occurs makes controling the vehichle unsafe. It loses power and or surges at will. A hope to make it to the side of the road without crashing or causing a crash is an issue. I cannot afford a repair establishment, a family member does my repairs. ... There has been no other inspection of the issue. As for warning lights. No. Everything is fine until the unit is jiggled away from the block after the bolt snaps in half. The force of the tensioner unit action (im assuming) is too much for the bolt - causing it to snap in two. It has occurred 2 times the second was the beginning of Feb 2025 and the first about 9 to 10 months…”

“The contact’s wife owns a 2013 Buick LaCrosse. The contact stated that on several occasions while the brake pedal was depressed, the vehicle lunged forward and the engine stalled; however, after releasing the brake pedal, the vehicle went into LIMP Mode and then lunged forward. The contact stated that the engine engaged at low speeds. Additionally, the contact stated that there was an abnormal grinding sound coming from the vehicle. The oil warning light was illuminated. The vehicle was taken to the dealer where the cause of the failure could not be determined. The vehicle was taken to a different dealer where it was diagnosed that the main drive belt and valve cover gasket needed to be replaced. The vehicle was then taken to an independent mechanic where it was diagnosed that the valve cover needed to be tightened but the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 83,907.”

“The contact owns a 2013 Buick Lacrosse. The contact stated that after reversing out of the garage and parking in the driveway, turning the vehicle off and removing the ignition key however, approximately 30 minutes later the vehicle started independently. The ignition key had to be used to turn the engine off. The cause of the failure was not determined. The manufacturer was notified of the failure. The local dealer was not yet contacted. The contact indicated that the failure posed a severe carbon monoxide hazard. The failure mileage was 63,000.”

“The contact owns a 2013 Buick Lacrosse. The contact received notification of NHTSA Campaign Number: 20V764000 (Suspension) however, the part to do the recall repair was unavailable. The local dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was notified however, no further assistance was provided. The contact had not experienced a failure. Parts distribution disconnect.”

“The contact owns a 2013 Buick Lacrosse. The contact stated while driving 60 MPH, the brake pedal was depressed, and she heard an abnormal sound coming from the vehicle. The check engine warning light illuminated. The contact continued to drive to her destination. The vehicle was taken to the dealer who diagnosed that the generator control module had failed and needed to be replaced. The contact stated that the failure had been reoccurring while driving. The manufacturer was not notified of the failure. The vehicle was not repaired. The approximate failure mileage was 150,000.”