Ed Corley Nissan Used vehicles aren't inspected properly, services Tect aren't certified Gallup, New Mexico

I had move here from Littleton Arkansas to gallup new mexico, i was looking for a reasonable used car. My first stop was ed Corley Nissan, so I was looking at the used cars and I fell in love with a 2010 chevy silverado. I was excited so I applied for credit and yes my credit is pretty good, I could of gone of gotten a brand new vehicle, but that's just me I'm love used vehicles. I sign the contracts and drove home, within a week my transmission started slipping, I took my truck back to ed Corley and they inspected. Ed Corley service Tect have me back the keys and they said they look at it and they put a anti skip fuild in my transmission. I drove home worried that I made a mistake of buying a vehicle from this place. A day has gone by and the transmission started slipping again. I'm mad because they gave me a lemon. My mistake was coming to this dealership