Review on Enhance Engine Performance with ACDelco Professional 9748GG Spark Plug Wire Set by Troy Caldwell

These are high quality wires but don't accept Revain's 'THIS IS SUITABLE FOR YOUR VEHICLE' comment until you've done your homework or you end up sending them back. Revain's "THIS FITS YOUR VEHICLE" tool overlooks the difference between ACDelco 9748GG (for coils marked 19005218) and ACDelco 9748HH (for coils marked 12558693) - the latter has a longer wire of 1" to 1 1/2" between the caps. Check the coil stamp and inspect before ordering. If you're not sure where it is, simply unplug one of the existing plug wires and measure the length of its wire BETWEEN THE CAPS. If your wire is approximately 5.75 inches long, you will need the longer HH series. If the length is less than 5 inches, choose the shorter GG series.