2013 Buick Lacrosse engine problems

“2013 Buick Lacrosse hybrid, campaign #13136, NHTSA 13V173000. Intermittent Battey light illumination Service Charging System warning. battery voltage drops until loss of power. After car setr for a period of time, when started Battery voltage is approximately 14.5 volts until the battery light illuminates Service Charging System warning is indicated then the battery voltage slowly until the voltage drops so low it quits.”

“Today is 8.26.2025, I took this car back and left it w/dealership: Let them figure it out! I told them 0ne month after purchase this car is constantly EMPTY with no/Oil. I should not be getting oil changes this often. "Oh, it just burns more Oil and you bought a USED car"...Months later I hear smalls sounds, engine light comes on, then goes away, smoke begans to continue spreading behind the BUMPER building a permanent black spot on bumper! It smells, from time to time, plus car feels sluggish when driving past 50mph almost SCARED it will cut off** Now, I gather my funds that I don't have to SPEND (CASH) no CREDITCARD and I proceed to BELLE TIRE! I am on file within their system. (Receipts) They do what they do... apparently no Leaks. But the car is burning too much oil!! too Fast! "Keep an Eye on your Levels"... hmmm* I also got a MAINTENANCE TUNE-UP on my next visit. So far roughly $2000 has been SPENT towards this VEHICLE (Buick). (New Battery also) plus AAA Cost *I have a Membership* Now time continues to move forward this car KNOCKING,CLOUDS of SMOKE, In the car, Outside the car, Around the Car, thru the vents, PULLING, STAHLING, KNOCKING, CLUNCK,CLUNCK,;…”

“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.”