Poor communication. This concerns the Chevy division. I was a service member who was driving down to the area for 2 week summer annual training. I was told to use my own vehicle to get to Laureal MD from CT. I reached the area without incident or signs of car issues. On the first day of class, June 1, Saturday, my car warning system sent out engine overheating alerts. Other dash board warnings included engine power reduced, check thermostat, shutting down AC, etc. This happened at a point where the breakdown lane that was too narrow that I felt was safe to stop the vehicle an call AAA. I kept pushing to Capitol Technical Community College where it was a safe enough area to be picked up by AAA. On the way to Capital Technology Community College, my engine started to vibrate and slow down, so I stopped on the side of a secondary road in the dirt to wait for the engine to cool before starting again and reaching the community college. I called AAA, who sent a tower, and said they would drop it off at Autonation since it was a trusteed AAA garage and it was within the free 5 mile tow zone. The tower dropped me off at my duty location and took the car to Autonation. At the time I was housed in Clinton, MD, and had to rely on taxis and rides from fellow soldiers. I tried to call them that day, and they said they could not look at it until Monday. Approximately Monday I did read an e-mail, where they listed the diagnosis, and mentioned that they would levy two diagnostic charges for the overheating and the engine vibrating. I e-mailed back and said that only one diagnostic charge was necessary since the engine vibrating was linked to the overheating. I followed up with a phone call on Tuesday and reiterated the same point, and the person I spoke with agreed that the problems were overlapping and only one diagnostic charge was needed. I then came in for lunch break during training and inquired what was going on. I recall singing some piece of paper, thinking it was an approval to do repairs listed on the work statement sent to my e-mail. I also provided them the number of the last mechanic who worked on it in CT so they could reach him if they had questions (as requested) On Wednesday I was told that the job was done, and that through various warrantees the total costs were on $144.00 vs $750.00. At this point this is what I believed was wrong with the car. They explained that the problem was a possible leaking coolant tank or the last mechanic who worked on it forgot to refill the coolant reservoir after completing work related to installing a new fan. I came in tried paying for it with my government travel card, yet I discovered that auto-repairs were no authorized on government travel cards. I told them I would have to wait until Thursday for my civilian job check to pay for it. I paid Thursday, went out the vehicle with a fellow soldier, and started it. The vehicle gave me the same overheating warnings and behaviors that I experienced when I first brought it in. I was very pissed, and inquired what was going on. A different sales rep looked up my account and stated that I had apparently declined work. I NEVER declined work, and actually believed that everything was covered based on the conversation I had on Wednesday.The other sales rep stated that I would have to wait until the sales rep I first worked with came in tomorrow. Called again, got through to the original sales rep, who adamantly claimed that I declined work, while I insisted that this wasn't true. I no longer wanted to argue with this person, told him to just fix it. He stated that it would cost the original price minus the $144.00. I explained that I would then need to wait until next Thursday to pay for it again. I got a call next day claiming it was fixed. On June 9 we stopped to see if they did the work, not realizing it was closed. Car was left unlocked, so we could pop open the hood & confirmed their coolant tank work. Paid for It next Thurs, no further incident. Poor communications, can give a little credit for coolant tank. Brian Ghilliotti read more