Engine light is on.....Suggestions

[Bluechip]

I have a 2007 Chevrolet Tahoe that I purchased new. The wife came home this evening and said the engine light had came on and it showed the transmission temperature at 165 degrees.

The car has about 83,000 miles on it and I have never serviced the transmission. Just wondering if anyone has encountered this problem. I'm not sure whether to take it to a mechanic shop or take it to a transmission place. I checked the oil and the level was fine and the oil didn't smell burnt.

Any suggestions will be appreciated.