2010 Chevrolet HHR Problems, Defects & Complaints The 2010 Chevrolet HHR has 620 problems & defects reported by HHR owners. The worst complaints are accessories - interior, steering, and lights problems. CHEVROLET HHR Problems - 2010 CHEVROLET HHR - ARFC Electrical System Problem on the 2010 CHEVROLET HHR. This information may be used by NHTSA during the investigation process. You may file your own complaint by calling the NHTSA Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153. You can also file your complaint online .