One problem related to engine grinding noise has been reported for the 2012 Chevrolet Sonic. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Chevrolet Sonic based on all problems reported for the 2012 Sonic.
I have a 2012 chevy Sonic lt automatic with the 1. 8 liter. The car started having problems around 45,000 miles and has gotten worse over time. The car on cold start ups has a grinding sound. This grinding most of the time only happens on cold start ups but does at times happens on warm start ups. This sounds like metal against metal and it rattles. This seems to happen until the car is fully started and running. I am getting concerned because it is getting worse and louder.