120k and going

Can someone list the things I should concider having done to my 99 Blazer if I plan on keeping it. I have 120k miles and have kept. up with the maintainence. What other areas should be watched or replaced before failure?. I am not looking to spend money but invest in a reliable vehicle.

Read the sticky BlazerLT just posted a few days ago up top on things to do to keep your truck running great. good luck