For quite some time, the front right air bag sensor does not sense that there is a passenger sitting in the front right seat. We have had the sensor checked repeatedly at the dealer, and they have not been able to replicate the problem (saying everything is fine). The passengers typically are our children, both of whom are 5'9" tall and weigh 120 to 125 pounds. We usually have to stop the car, turn the car off and then on, and then it works. This past week, the sensor was flashing, and we got a related "service air bag" light on the dashboard. We took it in to the dealer, and have been told it is a $1,000 repair to replace the front right passenger sensor module. This after we have had this item checked multiple times (and have been told that there has been nothing wrong with it), and, after a full extended warranty on the car (which included air bags) has expired. There has been a recall for 2007 GMC Acadias for improper sensors, but our car was not included in the recall. In 'googling' this issue on the internet, we see several complaints on official car sites like edmunds, stating a similar problem for other Acadias. We believe that GMC has known that it has had faulty sensors on their 2007 GMC Acadia models, but did not make their 2007 recall comprehensive enough. We would like for the nhtsb to investigate with GMC how many other 2007 GMC Acadias have been serviced for similar problems. Our car has never been involved in any vehicle crash or accident.

- Waunakee, Wi, WI, USA

Mold/musty smell, water leaking from dvd entertainment system and under dash on both driver and passenger floorboards. Dealer cleaned sunroof drains, replaced sunroof seal, still leaking. Water is settling into electrical components in dash including the blower motor.

- Newport News, VA, USA

The contact owns a 2007 GMC Acadia. The contact was driving 25 mph when all of the warning lights on the instrument panel started to illuminate. The vehicle was taken to the dealer who inspected the vehicle and stated it was an electrical failure showing 27 codes. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was 93,452.

- Estherville, IA, USA

I experienced water leaking and running down the inside of both of the front doors. In addition, the dash lights faded in and out intermittently, the clock loses time, the nav and radio screen blacks out, and the stability trak service light comes on. They "fixed" the water leak by extending the drain hoses on the sunroof. All of the electrical problems were found to be related to the leaks in the sunroof. On Sept. 18the of the same year, I returned the vehicle to have a recall on the sunroof drains performed. I advised that I was still having the same electrical issues. A dimmer switch was ordered. On Feb. 20, 2012 I started my vehicle and heard a faint pinging noise like a dying smoke alarm emitting from the passenger dash area. I took it to a GMC center and was told that water had leaked behind the dash, causing corrosion and a short in the ip fuse box. I had to pay almost $1,000 to have the leak sealed (design flaw) and had to have a new electrical block installed. I called and complained to GM that I should not have to pay for damage that resulted from 1) a poor design and 2) damage that should not have happened since I had taken the vehicle in twice on prior leaks which were supposed to have been fixed. It has been three weeks and I am still getting the run around from GM. Now they claim it wasn't the sunroof leaking, but the door. A leak is a leak and it should have been checked on the prior service visits. Apparently the leaking has been going on for quite sometime. I see that others have had this same bad experience. Here we bailed out a company that won't back up its product.

- Savannah, GA, USA

We have experienced recurring leaks in roof of vehicle, apparently related to problems with sunroof drains, resulting in issues with electrical system (intermittent problems with stereo, windows, power locks, power mirrors, etc.) very concerned about impact on air bags.

- Seattle, WA, USA

I am on active duty an active duty military member. While attending a military school, I purchased a new 2007 GMC Acadia from a GMC dealership nearby. After the course, I served a year at a military station in another state, while there, my vehicle was serviced twice for recalls by a GMC service center nearby. One of the recalls was to fix a defect in the sun roof that was causing water leaks. I had the vehicle serviced in 09 while the vehicle was still under warranty just before shipping for a 2 year overseas assignment. At that time, I identified some electrical issues. Soon after my arrival to my overseas assignment, more electrical issues developed along with mystery water leaks that were saturating the carpet and causing mold to grow inside the vehicle. There was no GM service center in that country so I had to live with the leaks and electrical problems. Finally after about a year, I had a minor accident where my tire hit a guard rail doing about 10 mph. All the air bags deployed but there was no other damage to the vehicle. At this point I quit using the vehicle. The seat belts didn't work, the ac and heater didn't work, the left blinker didn't work, the engine would not shut off with the key, the battery box behind the passenger seat kept flooding with water and I had to disconnect a battery cable every time I parked the car to keep the battery from dying. The vehicle was unsafe. I am now stationed in the us and have shipped the vehicle back to the usa. I am now trying to resolve all these issues with a local GM service center but I am being told by that service center that the vehicle is basically totaled with only 60K miles but since it is now out of warranty, I am responsible for the repairs.

- Youngstown , FL, USA

Battery completely drains while parked in my garage overnight. There isn't even enough juice to release the rear door lock so I can retrieve jumper cables from the rear storage area of the GMC Acadia.

- Blaine, MN, USA

2007 GMC Acadia all warning lights come on and sterring gets very hard to turn. This is third event since Oct 2009 and the dealership has "fixed" it each time.

- Running Springs, CA, USA

Lost power steering and alternator stopped charging during more then one rain storm. The serpentine belt gets wet and slipped because it's exposed to the element from the right front wheel well.

- Sherman Oaks, CA, USA

Water entering interior of the vehicle. Points of entry include: Side air bag openings, foot emergency brake(which is located near vehicle electrical components) shoulder seat belt openings and through dvd screen. This is the second time my vehicle has been service for this complaint. The headliner was removed and repairs have been attempted. My concern are with the damage to air bag output in emergency due to water, electrical component damage such as dvd player and electrical component by emergency brake and also the moisture the interior of the vehicle has been exposed to for mold and mildew.

- Fort Lee, NJ, USA

Existing ODI id number references for 2007 Acadias 10255735, 10254149, 10248331, 10211267, 10210839, 10210533 existing ODI id number references for 2008 Acadias 10246694, 10243591, 10241649, 10230134, 10229896, 10212682 the above ODI id numbers signify existing complaints identifying water leaks and resulting damage in 07 & 08 GMC Acadias. GM instituted recall campaign #08207: Customer satisfaction - sunroof water leak-install drain tube extensions ' dated: Aug 27, 2008. Campaign was preceded by numerous tsbs linked to the same type of water leak. After first leak in oct08, brought vehicle in for the recall and experienced 2 subsequent leaks since the initial recall repair as a result of the same condition. Have had mold in the carpet and padding on 2 separate occasions. Have had significant corrosion in one of the 2 main fuse blocks to the point where srvc. Tech at the dealership could not turn vehicle off using the ignition key. Vehicle leaks after driving in rain. Have service invoices stating that dealer performed water tests after each repair and found no leak yet vehicle has leaked after every repair. Have detailed color photos of soaked wires, saturated headliner, mold damage and corroded fuse block. Vehicle was only driven a total of 689 miles from date of the initial leak to date of the third leak. During third leak, water also dripped from vehicle's rear display onto third row seats. I feel that GM knew about this problem from the beginning because their aug08 #08207 recall actually identified VIN breakpoints of the affected vehicles. Instead, GM chose to deal with it on a case-to-case basis and it has become a very serious issue. The consequences of the water damage can and have already been far-reaching and potentially could injure, kill or affect the health of owners of these vehicles. Consider opening defect investigation, order GM to do safety recall to fix problem before someone is seriously injured. This deserves some press.

- Chesapeake, VA, USA

Sunroof leaks in to electric system, thank god driving on side street, brakes locked up and was able to get to side of road. Dealer westboro GMC tried to fix leak X 4 but leak continues, brake stability problem, remote start, mold, car pulls to right when brakes applied, just to name a few of the electric problems caused by water running in to electric system. Dealer washed there hands of it. I now own a $40,000 lemon.

- Auburn, MA, USA

Several issues with this new 2007 GMC Acadia. Most prevalent is the failure of the gas gauge not reading the gas reading correctly. 1st time noticed and taken for service was 3 mo. Old. The gas gauge reads (E) when I've just filled up the tank. Dealer replaced 02 sensors. 1 mo later experience same issue. Gas gauge reads (E) even when tank is full. Taken back to dealer and this time replace (2) O2 sensors and the "sending unit". 2 days later, with the gas gauge reading at half full, the car lunges forward into another gear on freeway in traffic, and stalls. Cannot turn car on - all warning lights on. Towed to dealer. Now states that I need a whole new gas tank because the "baffle" is broken? still at the dealer and is unresolved. This car is unsafe. Previous issues: Car leaks at the sunroof. Not fixed yet lumbar support broken - somewhat fixed but still not like the new ones on the lot. Lumbar handle fell off - replaced backup sensors fell off of bumper - replaced seat tracks jerk - replaced both driver and pass. Still not smooth but dealer says that's the best they can do.

- Alta Loma, CA, USA