GM is eyeing the lucrative accessory market with its Z-Spec line-up of products. The concept parallels the accessory program Scion has with dealer installed accessories and more serious TRD parts. The soon-to-be released Chevy Sonic joins the Cruze, Spark and Volt Z-Spec concepts that dropped at the 2010 SEMA Show under the Z-Spec umbrella. The Sonic’s line-up of goods will include a multi-piece body tuning kit, upgraded alloy wheels with 16-inch and 17-inch designs and intense graphic treatments.