Car has excessive gas consumption. It is presently getting only 24.9 miles to the gallon. Occasionally it will have a very strong sulfur odor coming from the exhaust pipe. I should be averaging about 34 miles per gallon with driving pattern which is a mix of city and highway mileage.

- Atlanta, GA, USA

Car has excessive gas consumption. It is presently getting only 24.9 miles to the gallon. Occasionally it will have a very strong sulfur odor coming from the exhaust pipe. I should be averaging about 34 miles per gallon with driving pattern which is a mix of city and highway mileage.

- Atlanta, GA, USA

This the 3rd time I was driving slow, coming to a stop but didn't have to stop, went to proceed and realized the car had shut down. Each time I was in a parking lot, so I didn't have a lot of traffic around me, but had I been on the street it could have caused an accident. Each incident I restarted with no problem.

- Austell, GA, USA

The air conditioning system cycles off for about 30-40 seconds during normal operation for no apparent reason. GM had a recall on it where they replaced some parts. Even after the recall, the problem persisted and I was told by the dealership (auto nation, greenacres, fl) that GM designers told them that the A/C was designed to work that way and there was nothing they could "fix." So I'm forced to live with a poorly performing A/C system in a brand new 2013 vehicle. Really"?"

- Lake Worth, FL, USA

On multiple occasions I have driven my car and parked it. When I have returned to the car it will not start. On star diagnostics tells me there is a problem with the transmission, engine and anti brake system and that I am to get it to the dealer/repair immediately. I have had to wait several hours before I can get it started again. I have been in situations where I am in an areas without phone or cell reception to call for help. It has been to the dealer repair shop 4 times and they are unable to correct the problem. They say until they can replicate the problem - they cannot fix it. Finally with this last (4th) visit they were able to replicate the problem twice. But I was informed they have no idea where the problem is coming from and they have no solution at this time. They will return the car to me after 9 days as is with no fix. I am afraid to drive across Colorado for fear I will be stranded.

- Edwards, CO, USA

The air conditioning system does not work. I've had it to the dealers 6 times since July. It does not blow cold air. The compressor has been replaced; the expansion valve has been replaced; the system was drained and recharged. Nothing has fixed the problem.

- Hopatcong, NJ, USA

The A/C dose not work while the car is at idle. When driving the car the A/C will begin to cool. When stopped at a red light, stop sign, the A/C will stop cooling and blows warm air out of the vents. The dealership has troubleshoot 2 times and do not know how to fix the problem. Told me that the engineers at GM are working on a repair for this issue. It is now the middle of August and no resolution has been found. The dealership is no help and has no new information and GM customer service is no help either. My car is 2013 Spark. It is the 2lt model with a 4 speed auto transmission.

- Inverness, FL, USA

In June of 2013, my A/C stopped working on my 2013 Chevrolet Spark. The car was taken in for warranty service three times. The expansion valve and compressor were replaced and the A/C was partly restored. The A/C will not work while the car is at idle. When driving the car, the A/C will begin to cool the interior and seems to be fine. When stopped at a red light, stop sign, or in my drive way, the A/C will stop cooling and blows warm air out of the vents. A fourth warranty service call was opened for this problem in early July. The dealership has troubleshoot the A/C issue and do not know how to fix the problem. The dealership has given me a case number from General Motors llc and told me that the engineers at GM are working on a repair for this issue (pic5858A: Insufficient A/C performance at idle - Jun 13, 2013). It is now August of 2013 and no resolution has been found. The dealership has no new information and GM customer service is no help either. My car was manufactured on 08/2012. It is the ls model with a 5-speed transmission.

- Brighton, TN, USA