KWhaley1990

Hello the name is kyle and I recently bought a used 2005 chevy equniox. I'm basically just wondering what the first maintenance preparation checks I should do or look out for would be?. For example I'm thinking that the previous owner has never really cared for this vehicle and dogged it pretty bad. I'm going to first do a fluid change all around. It has about 125,000 miles on the vehicle and probably has never had a trans flush or radiator flush honestly so I'm wondering if changing the fluids would damage anything (trans wise)? I know it needs other things as well but I'm trying to start from the top and work down. Any advice or direction on the matter would be greatly appreciated. Thanks.