Ive had my trailblazer for 6 year or so now. Around 177000 miles on it. Had this issue for a few months where it would sometimes stall whenever id idle for too long, stop light or drive thru or whatever. We replaced the throttle body on it at the suggestion of my mechanic uncle, seems to have fixed it for around 4 or 5 months, cant remember how long but it was earlier this year. Now it seems to be happening again. No issues besides the actual stalling, car turns right back on, etc. RPMs at idle DO seem to be a bit lower than normal, normally 600-700, now they can hit 550ish.

Any suggestions would be appreciated. Im currently saving up for a new car and doing my best to keep this one going for a bit longer.