2017 Chevrolet Bolt fuel/propulsion system problems

“While driving the car it suddenly, and without warning, abruptly slowed to a stop and the display showed "propulsion power is reduced", then the "service soon" symbol came on. This could have happened in fast moving traffic, which definitely could cause multi-car collisions. The GM service bulletin (Document ID: 5409616, revised February 13, 2023- see attached copy) states that this is likely due to "a spread terminal on the vehicle harness connection X2 on the T12 transmission assembly. The terminals may not have been perfectly aligned during installation at the vehicle assembly plant." This is a known, dangerous, malfunction, and GM has not issued a recall for it. The "correction" is to replace the "engine wiring harness" which goes to the EV motor. GM is also not covering this repair under any extended warranty, although it's a safety issue and really should generate a recall. Please see attachment.”

“My car stopped in the middle of a busy intersection and my battery relay melted and caused damage to the transmission and the transmission needed a sphincter. The whole battery system needs to be recalled for melting and almost setting my car on fire.”

“On May 24, 2022, I brought my 2017 Chevrolet Bolt EV into Vic Canever dealership to have the high voltage battery replaced per the recall instructions (see invoice). Ever since the “new” battery was installed, I can no long fast charge my vehicle to specification. I have tried several DC fast chargers including the DC fast charger at the dealership. The dealership fast charger would only charge at a rate of 18Kw (see picture). I was able to charge a little faster at a DC fast charger in Perry, Michigan at 29.7Kw (see picture). Both are a long way away for the original charge rate of 55Kw. The other problem that occurred after the battery exchange is that the range significantly declined. With the original battery the vehicle range was around 250 miles. Now, with the new battery, I can’t even get to 200 miles range (see picture). With all the problems GM has had with the Chevrolet Bolt EV, I think it’s time to start another investigation into what they are doing to fix the original problem and making things worse with their remedy.”

“This car worked reliably until the battery recall battery was exchanged then this started happening about a month later. First the vehicle died upon slowing down, driver was exiting a highway ramp stopped the car and turned off the car and turned on again and drove home without further trouble. Happened again, same thing this was at night. Then myself as driver, Took car to dealership, stayed in right lane on highway then car failed to accelerate but maintained about 40mph then died as slowing down on exit. After much time turning off and on again, the car finally allowed it to be put in drive and I made it to the dealership. After a week the dealership couldn’t find anything wrong with the car and said no charge but they can’t diagnose. Driving the car again, it drove fine until it didn’t. This time died and wouldn’t allow it to be put into drive again. Said conditions not right to shift. Towed it to a different dealership, the one that changed the recalled battery and they got 77 code errors and cannot figure out anything after a month. Still keeping to drive to recreate the problem. The biggest safety issue was that the emergency blink lights turned off when…”

“After about 5 years and a warranty replacement battery, I intermittently find the “Propulsion Reduced-Service Soon” light on. It can appear any time after which only a third of the 60kWh battery is on-line, and in any event the battery will not charge over one third. Highway driving on a crowded Interstate 5 becomes very hairs as both acceleration and regeneration braking are markedly reduced. It is now at the service department of Bill Pierre Chevrolet in Seattle. Those guys are great, and are doing everything they can, looking to GM for a promised reprogram that has not been forthcoming for some two weeks and counting. This might seem like a minor consumer gripe, but it turns out that this is not a new condition, and has persisted since shortly after the 2017 Bolt came out. See <https://www.carcomplaints.com/Chevrolet/Bolt/2017/electrical/propulsion_power_reduced-service_immediately.shtml>. The Bolt is a great car, but this has shaken my sense of safety in long distance 80+ miles of highway travel. I no longer consider this to be a safe car.”

“After the second recall replacement of the lithium-ion battery, the car became undriveable because it could not be charged. A message appeared before stating "Propulsion Power is Reduced". This is after the 2nd new battery was installed. The car has been taken to the dealership. The dealership stated that it is a software problem which GM is looking into.”