89 s10 blazer rear brake locks up when sitting
 

when it sits for a day,the driver side rear brake is very touchy til i use them for a bit..It locks real easy.then is fine,,wheel cyl?? brake adjust to tight or e-brake?

did anyone ever get back to you on this? im having the same issue when my blazer is still cold in the mornin.

wheel cylinder may be leaking, also i had a truck that did this, it has a bad axle seal making the pads all rubber like and would lock up one of the wheels every morning for the first few brakes, probably just take your drums off see if theres anything leaking, hose them down with brake clean and re-adjust and reinstall them

I had a 1984 LeSabre that had that same problem with the rear brakes. In my case, it turned out to be a piece of the friction material that broke off the brake shoe. That would cause the brakes to stick first thing in the morning because it was lodged in between the shoe and the drum. After driving for a few miles it would dislodge and be fine for a while.

Definitely pull the rear drums and check for any leaks or obvious broken parts.