Brake Disc Pads problems of the 2009 Chevrolet HHR

My air bag service indicator light turns on intermittently. At least 5 times in the past year, no accidents, no problem seen with air bags by service dept at dealer. ???? . The safety lock on the drivers side controls for all passenger windows does not lock the window operation. Braking system problem in the past 6 months. Ive returned to the mechanic 4 times had my brake pads changed, rotors turned, rotors resurfaced , only to h Ave the same problem. . . . . Steering wheel shuddering bad when applying the brake. The rotors overheat and warp, but I will drive only 2 blocks and it happens. Dont think that is enough to overheat the rotors.

At speed on steep downhill when applying brakes there is a violent shaking of the wheel. The vehicle was serviced and rotors were turned and new brake pads installed also a repair was made to a steering component. Less than 5,000 miles later the same issue has returned.

At 18,000 mile my 2009 Chevrolet Hhr started shaking as the brakes were applied while going down a 5% mountain grade. Within a short distance after leveling off the braking returned to normal. This occurred several more times and at 24,000 mile the vehicle was taken to the dealership to have the brakes checked. The diagnosis was that the rotors had over heated and warped. At 44,000 mile the vehicle started shaking again as the brakes were applied while going down a 5% mountain grade. Brake pads do wear out. Rotors do need to be turned. Violent shaking from rotors warping because of overheating is not normal. It is an indication that the braking system may be undersized for this vehicle or that inferior parts are being used. The brakes have not been applied excessively. The vehicle is not overloaded. The vehicle has not been subject to sudden braking. The high mileage on the vehicle is from freeway driving.