Apologies for the long post- I hope I've provided all pertinent information.
I have an '02 Trailblazer with 173000 miles and recently installed all new FRONT suspension components, including upper and lower control arms, coil-over shock, sway bar links, upper and lower ball joints, CV drive shafts, wheel hub/bearing assemblies, rotors, pads, and calipers. The calipers are remanufactured parts.
After installation the front brakes were bled satisfactorily and a firm pedal was achieved. A test drive of about 2 miles was made, and it was determined that the driver-side caliper wasn't releasing as it should, and the rotor (which was also new) on that side overheated to the point of changing colors from silver to gold with blue streaks. Meanwhile the passenger side caliper worked fine. No discoloration of rotor.
It was quite difficult to remove the driver-side caliper to take back to auto parts store, but I was eventually able to pry it off the brake bracket.
Of course, brake fluid was leaking from front brake hose after it was disconnected. I put the end of the brake line into a container of clean brake fluid, but of course that didn't stop fluid from being pulled through the brake line by gravity. By the time I returned with another caliper and rotor, the brake fluid reservoir was empty. At no time was the engine started, nor was the brake pedal depressed.
I installed the new rotor and caliper and filled the reservoir. I cracked open the bleeder on the caliper and waited until the caliper filled with fluid, and then bled the system, being sure to keep the brake fluid topped off (I used a bottle made for this purpose that I got from HF.
I'm not having any luck. Bleeding the front brakes is not solving this issue. The brake pedal continues to go to the floor (it was fine before all this), and I notice that the ABS idiot light is now on. I've double-checked the wheel sensor connectors, since I also replaced the front wheel hub/bearing assembly on each side. I don't recall seeing the ABS light during the first test drive.
Any suggestions as to how to recover from this will be appreciated.
I have some new information. When I first posted this question, the vehicle was still on jack stands. I decided to see what the brakes were like with the car on the ground.
What I found was that once the pedal got all the way to the floor, I could stop it, but it felt like there wasn't much contribution from the front brakes. I took it on about a 2 mile test ride over city streets keeping the speed to 30 mph or less. Though there was no noticeable change in the braking, the ABS light on the dashboard did go out and it stayed out.