I believe you need to put on a set of OEM shocks. Check with a GM dealer for the right part number to match your VIN.
The Coupe rear shocks are different for left and right. and different for sedan, wagon or coupe
The fronts are different for AWD and RWD.
and then of course we have the different suspension and tire sizes. FE2, FE3.ECT.
A few years ago when I would look up part numbers on-line at GM parts they would show separate part numbers for the Coupe vs all other models when it came to shocks or springs. About 1.5 years ago the on-line GM parts started to drop a lot of the coupe-only parts and started showing the coupe with sedans.
Six months ago when I looked up part numbers on-line for shocks on my coupe FE3 with 19" tires, and then I called my GM dealer where I get deep discounts and no sales tax, he looked up the parts by VIN and came up with different part numbers.
Monroe shows: one part number fits all models for rear shocks,
for front shocks, one part number fits all RWD models.
Monroe shocks are engineered for one size fits all. Not a good thing.
Hell, Monroe has a box to check off what kind of ride you want, Soft/smooth, Improved stability or performance ride. BUT there is no difference in the part numbers when I checked each type of different ride characteristic.