One problem related to engine grinding noise has been reported for the 2009 Chevrolet Malibu.
1. Brakes squeak and are not as responsive as they should be a. The dealer has checked them several times and says there is no problem 2. On two occasions when traveling between 50-75 m. P. H, the car has not accelerated properly and has made strange grinding noise a. Dealer indicated that another owner of the same model vehicle expressed the same complaint b. Dealer said computer did not show anything wrong on my vehicle, or the other vehicle owner's vehicle 3. On 4-6 occasions, the car has surged. . . Sometimes this happens @ slow speeds and other times when cruise control is engaged. . . . I am afraid to use cruise control anymore a. Dealer says computer shows no problems.