Review on ACDelco D521C Ignition System: Original Equipment for Optimal Performance by Abaraham Duvernot

This ignition coil is easy to install. The only problem I had was pulling off the old spool. The old coil had to be replaced because my Cruze lost power at the slightest lift and would stall. When the old coil was removed, one of the spark plug caps broke and the spark plug was coated with a white powdery substance. The second problem was that another spark plug wire had come loose from the coil. This replacement coil (along with a new set of spark plugs) fixed the problem. I have driven over 700 miles since the replacement and the car is running better than ever.