While driving on city streets and highways, the adaptive cruise control will not engage 25% of the time and will disengage without notice. "adaptive cruise control will appear in dic. however, this creates a safety hazard as you never know if the car will automatically slow down. i have filed case # 9-5379585813 with chevrolet and been to four dealers and they refuse to fix the problem. they no longer return my calls. i am afraid to use the cruise control.
When approaching a stop and applying the brake pedal, the brake pedal suddenly sinks and car loses traction and the car suddenly feels like it starts to slide. after releasing and then reapplying the brakes, the returns to normal.
While approaching a red light at 35mph on a smooth road when i pressed my brake pedal nothing happened for nearly a second then the brakes worked as usual. luckily no one was in front of me or i could of easily been in a crash. the volt has a brake-by-wire system with regenerative braking. i feel that either the regenerative braking failed and the computer took a long time to revert to the friction brakes or the brake module temporary failed and neither regen or friction brakes were available. i've driven a first year leaf where sometimes there is a slight delay when switching to friction brakes in certain situations, and this event was much much worse than that. road and weather conditions were perfect that day.
The brake pedal and gas pedal both modulate pressure needed to either accelerate or brake. the brake pedal will change pressure needed to brake suddenly, causing you to apply much more force to brake pedal, which is unexpected and dangerous. for example, when driving at highway speed, a car in front of you stops, and you apply brakes. traffic clears and you release brakes, but then car in front stops again and requires you to brake again suddenly. this time the brake pedal will require more pressure and pedal travel is significantly more. this is unsafe and needs to be changed.
While slowing down approaching a red light with the gear in l (regenerative braking), the car was in electric mode and traveling at a low speed (under 10mph and likely less than 5mph) when the passenger side front tire went into a large but shallow pot hole at which time the car felt like it accelerated (at the very least deceleration ended). my foot was already on the brake pedal (not sure if i was pressing it); however, i immediately mashed the brake pedal down as far as it would go. at first this did not seem to have any effect. after a moment, though, it finally kicked in and the car stopped immediately. i do not believe i hit the car in front of me (which was completely stopped). however, that driver wasn't sure if i did and asked for my information (there was no paint transfer or any marks on my car--there was a mark on the other vehicle which i believe was already there and the other driver wasn't sure and wanted to talk to her husband about it). note in the later section that asks "was there a crash?" i am marking no as i do not believe there was a collision nor is there any physical evidence on my car of a collision. however, the other driver may dispute that.
Vehicle brakes fail to fully engage intermittently. when slowing down on multiple separate occasions, the brakes work initially, then, the car feels like it's sliding on ice (dry summer roads) then the brakes engage again. the brake peddle generally feels normal at first, then goes soft and sinks. i've taken the vehicle to the dealership on multiple occasions who've stated there's nothing they can do. this is a serious safety concern to just send someone on their way with. i've also been working with general motors. while working with gm, they recommended i take the vehicle to a different dealership for a second opinion. the new dealership found error codes outlining the traction control module is malfunctioning and electrical ground issues exist.
This electric car has regenerative braking. besides being in the regular braking, there is a pure regenerative braking paddle on the steering wheel. but when you use this brake, the brake lights to not turn on. this is a major hazard as i use this brake all the time and cars behind me do not know i am braking and have almost rear ended me. chevy dealer says that is the way it is designed and is functioning perfectly. why has this been approved to design a braking system without any warning lights? what can be done about this?
Adaptive cruise control unavailable randomly occurs while driving using adaptive cruise control. presents a large danger of hitting other vehicles if the adaptive cruise control is used to come to a complete stop as it will randomly disengage while coming to a stop. cruise control only works 4/10 times attempted and was "fixed" by the dealer with less than 500 miles on the odometer. however the problem recurred within a day. looked it up in forums and it is not an uncommon problem. holding foot under the brake pedal allows cruise control to work but is more dangerous than randomly cutting off. no one in volt forum has gotten a complete fix to date. when they do i will be getting mine repaired armed with the correct information. but it is dangerous.
I was approaching a sudden red light and applied my brakes hard but not too hard (i did not suddenly slam the brakes). the brakes applied as expected at first but the brakes let up some and my vehicle failed to decelerate for about half a second before the brakes applied again and decelerated to a stop. i was not able to depress the pedal further when it was clear that the brakes were not decelerating.