Does anyone know how to remove the clear plastic covers behind the rear wheel, Mine are discoloured bad ,Looks like there for rock chips

 

Gentle use of a heat gun. Softening the adhesive is crucial or you may pull the paint off.

 

I had my LS in for some dealer warranty work and they replaced mine w/o me mentioning them. I'm sure they sell them and while there, just ask a mechanic and I'm sure they'll tell you how to complete the job. I've always found them very helpful.

 

Some people have all the luck. My local dealers wouldn't spit in your mouth if your teeth were on fire!