Annoying Squeak in Rear Quarter-panel Area

[VehiGAZ]

Lube it up. Maybe some spray-can lithium grease will do the trick (it goes on thick, so it won't run like WD-40).

[k4tmc]

Update...

I did not have any spray lithium, but did have some lithium grease for door hinge squeaks. Smeared a couple of blobs on the rear of the plastic sheet - problem solved.

Note that those 'push plugs' are not what they appear to be. Pulling on one caused it to snap into. So, I do not recommend trying to remove the sheet if you plan to replace it.

Henry