NHTSA Complaint #11530229 — 2010 CHEVROLET HHR

Noticed that the cruise control would disengage randomly when activated. I checked the function of the brake lights at night and found that the brake lights would turn themselves on randomly with zero brake input, disengaging the cruise control. In this state, depressing the brake pedal more than around 30-40% would turn the brake lights off, even with the brake pedal fully pressed. Furthermore, with the brake pedal pressed to a moderate level, the cruise control is able to be engaged, even with obvious brake pressure being applied. This defeats the cruise control disengagement feature and the cruise control system will fight against the braking system to maintain speed instead of turning itself off as it seems to rely solely on the brake lights for the automatic disengagement. This issue is quite dangerous as this seems to happen quite often with the brake lights, but I cannot find any sort of consistent scenario that causes these issues to occur.