I hear a creaking noise when I drive up a ramp into a parking lot. I think the torsion on the body of the car causes this noise, but I'm not sure where it's coming from. Could this be it?The only TSIB I could find open on the ISF (among other lexus vehicles) is L-SB-0090-08 "Upper/Lower Windshield Tick Noise"
If you have a creak, tick, or rattle noise from your upper or lower windshield according to the TSIB it may be windshield stoppers bonded to the glass or retainers. Dealers have the repair instructions if you have the problem. Would not recomend the repair unless you actually have the problem based on the repair instructions it sounds extensive. The repair is covered up to 48 months or 48k miles