Hi I’m Leo I have an issue with my 2007 Chevy Tahoe 5.3l 4WD with 220k miles, supposedly the dealership swapped motor and transmission before putting it on lot for sale. I started having this issue right after I got my new radio and subs installed. So right after I got my radio and subs installed my Traction Control light turned on when I drove it home that day but nothing serious at that moment, well next day comes up and I went to work and the light was still on and this time it turned off when I was running on the road but if I would stop at a light for like 5 seconds it would turn right back on, but this time I started feeling a push right after my transmission would go into 1st and that same Traction Control light would pop on and right after turn back off. I began to worry when it first did it thinking it could be my transmission but I’m starting to think it might be my differential because I noticed last week that it was leaking from the bottom and my tranny fluid looks good and my dipstick reads it’s full so I don’t know what it could be. I would really appreciate anyone’s advice, help or solutions to my problem.