I guess the drains in the roof are clogged. I have owned many cars with a sunroof and never heard of this problem. When it rains the rain collects in the roof of the vehicle. Sounds strange but true. I can hear the rain sloshing around in the roof of the vehicle. There are water marks all over the roof of the interior of the car. When I apply the brakes after a rain storm the water comes through onto the dash and all over me .I have been told that it is not the windshield . The problem is that the drains for the sun roof or clogged. Never heard of such cheesy workmanship. I have met 2 other people who have the same problem with the 2008. I have almost crashed twice because so much water came down in front of me , I couldn't see. CHEESY

I will never own another GMC vehicle! We bought ours in 2010, discovered it leaked from the interior lights within a week. Dealership said they couldn't find it. After 3 trips there they discovered it was a sunroof recall, fixed that.

I've had to replace the tires 6 times in 4 years! That's $4800 in tires! I've had the struts replaced, I've had to pay $800 to fix throttle body. Now it's leaking through the seatbelts and when you turn on the back windshield wiper, water squirts in from the windshield?!?!?! It's just a piece of junk!!

2008 GMC Arcadia On December 7, 2012, my wife had turned off the Arcadia (or so she thought) and exited the vehicle. Once outside the vehicle she discovered that the vehicle was still running, with the keys in her hand and ignition off. My wife notified me of the situation and I in turn called my mechanic. I delivered the Arcadia to my mechanic and after several attempts he was able to duplicate what my wife encountered (vehicle running with keys removed). I left the SUV there and received a call from him later that day and he told me that I needed to come and see him in person. After arriving, the mechanic showed me a fuse box assembly that he removed from the inside, next to the glove compartment on the passenger’s side. He shook the assembly a couple of times and water began to come out of it. He also pointed out the wire connection harness for the fuse box assembly which was corroded from water intrusion. The mechanic told me, for that to occur in both pieces, water had to be leaking into both assemblies for some time. He told me that this should never happen to only a four year old vehicle and that it was a manufacturing defect of some type and advised me to see a GM Dealership and show them the part and explain the situation. That afternoon, I arrived at Koon’s Chevrolet Dealership in White Marsh, Md. and asked to speak to the Service Director (John Wyant). Once the manager arrived I proceeded to tell him the situation that was going on with the 2008 GMC Arcadia, showed him the corroded fuse box assembly and gave him an internet article I found relating to water intrusion on a Saturn Vue. He then proceeded to tell me that anyone can write a article on the internet and informed me that GM or his dealership wouldn’t cover the entire cost of troubleshooting, service and the removing and replacement of parts. The manager indicated that his service department would probably cover 20%-30% of the total repair cost. I then asked him how long it would take to diagnose and repair the problem. He told me that it would most likely take 2-4 days from the time I dropped off the vehicle to the time it would be ready for pickup and the cost for labor and parts would probably range from $1,500 to $2,500. He told me that was the best he could do for me and after voicing my displeasure, I departed for the mechanics shop. I told my mechanic what the dealership had said, and he also told me that was a bunch of crap and they should backup their products that they sell. I discussed the dealerships cost of repairs and then I asked him if he could give me an estimate of the cost of replacing the fuse box assembly, drying out the connecting cables/harness and placing heat shrink wrapping around the connections on the assembly. He also indicated that he would make a “deflections shield/guard” that would help in keeping any further leaking water away from the fuse assembly. All he could give me was an estimate of a couple hundred dollars. While doing the repairs, he also “snaked out” the moon-roof/sunroof drain lines in case they were clogged (which he indicated they weren’t). I told him to go ahead and make the repairs we discussed and the final cost ended up being a little over $500.00. At this point, how the water is entering the Arcadia is still unknown. On January 23, 2013, I decided to take my Arcadia to the GMC Dealership in Glen Bernie, Md. and discuss the situation with this Service Director (Robert Yospa). While discussing the situation regarding the 2008 GMC Arcadia with the manager, he first asked me the VIN number and proceeded to check for any active recalls or Customer Satisfaction Memorandums (CSM) still outstanding, which there wasn’t. I gave him a copy of the CSM #08207A, Sunroof Water Leak and install Drain Tube Extensions, along with the letter from Customer and Relationship Services, General Director (Scott Lawson). Once he read over them, he asked me what he could do for me. I indicated to him that my Arcadia was having the same issue outlined in the Customer Satisfaction Memorandum and letter from the General Director of Customer Relationship Services. He then told me that he was going to contact the General Motors (GM) Service Department and see what they had to say regarding the situation. After approximately 10-15 minutes, the manager returned to tell me that the GM Service Department representative that he needed to talk to wasn’t available. He handed back a copy of the paperwork I gave him (CSM and letter), and told me to verify that the water leak going into the interior of the vehicle wasn’t coming from the windshield or the body itself and return back to him once that was verified. The wife took the Arcadia into Koon Chevrolet on 19 February 2013, because water was leaking into the driver’s side of the vehicle. She spoke with Dan Hasselburger, Service Leader (fills in for Service Director when he’s not available)