Problems with 2005 Cadillac STS STRUCTURE

2005 cadillas sts - frame rotting out - car is garage kept. upon inspection on my lift this weekend, i found substantial rust to both lower frame rails just behind the mounts for engine cradle. manufacturer fills the frame rails of this area with foam which absorbs and holds water and rots the frame rail from the inside out. this is definitely a manufacturer defect. now looking at thousands to repair a vehicle in otherwise very good condition.

Manufacture produced this car filling the inside of the unibody rails with an absorbent foam. these rails also have manufactured holes allowing water to enter the rails. the water is then absorbed in the foam and through age it has cause the unibody rails to rot from the inside out. this is the main structure of the car. i also have a 2007 cadillac sts with 85k where this is starting to become present and an 2005 cadillac srx 130k where this already happened and had to spend thousands in repairs. i understand with age comes rust however this is a manufacture defect. there is no reason for these cars main structure to of been filled with foam causing the "frame" to rot specifically where the engine cradle bolts to the body structure. had this addressed now i could of been driving the car and had the engine subframe rip from the unibody.

I was driving north on i-95 in virginia when i heard a loud pop and suddenly realized that the glass part of my sunroof had torn away completely. luckily no one was behind me at the time. the sealant that holds the glass in place had failed. the sunroof was closed at the time this happened. this is a serious problem. *tt

I have rust in my car and under the bottom. cadillac states this is normal and they cannot do anything until there is a hole in the vehicle. they rely on the dealers feedback. the district manager in the area is of no use. the dealer over rides his decisions. what does gmc paid this fellow for? *tr

The air dam shield on a 2005 cadillac sts keeps falling down and dragging on the pavement. the car was bought in june 2005 and the first incident happened in july 2005. the dealer replaced the shield. the second incident happened in august 2005 and the dealer reattached the shield. the third incident happened in september 2006 and the dealer replaced the shield. the dragging of the shield caused some cosmetic damage under the car and the noise of the dragging was quite noticeable. *nm