I replaced the inner axel seal on my 05 Tundra, and had to remove the brake line from the rear passenger cylinder. Do I have to bleed the breaks? Does the Tundra have self bleeding brakes? the brake pedal holds pressure..... Im no mechanic.

the break pedal held pressure when the truck wasn't running. As soon as I turned the truck on, I lost pressure in the brake pedal. I read through the brake bleeding trouble thread, and still have no idea what to do. This truck is my only vehicle and transportation. I need to know what to do ASAP. The truck is still up on a jack stand. Should I lower it, and just try to see if the breaks work? Or try and bleed the brakes?