15k miles....really??....bet yours is the only Blazer that gets this. Expect than many Blazers see well over 100k miles between diff oil changes...unless driven in mud/water often.

How often do you change the trans fluid?

 

Note to self: If you're shopping for a used vehicle, try to buy one from Christine.

 

Hey, I got the interval from the owners manual. I also am pretty conservative on how I try to take care of things. Ever since I priced even 10 y.o. 4Runners, I decided to try to get as much use out of this truck as I can. LOL

As for the transmission fluid, my transmission shop said every 30,000 miles. It is now up for to have that fluid changed for the first time since I had it rebuilt due to my towing with it while using overdrive.