So when i bought my 97 blazer back in july, I did the full tune-up (plugs, wires, cap, rotor, all fluids and filters) and its getting on close to a year now since I had it. Wondering when should I do the next tune-up and should I do a complete tune-up or just the filters/fluids? (Oil gets changed every 3 months, regardless if its been driven or not, haven't changed the trans fluid/filter since i did my initial tune-up)

 

If you used AC/Delco cap & rotor along with their platunum sparks plugs they should last 50-100k miles along with DexCool coolant. Air & fuel filter can go 30k.