2001 Spongy Brake Pedal (Bleed ABS unit)?

I purchased a use 2001 Limited. The brake pedal is spongy. If pumped at least once while braking the pedal is higher and firmer. I have 4 wheel ABS disk brakes.

I read an article regarding bleeding ABS systems. This is the meat of the article.

"To rid your car of this air, you'll need a scan tool that can interface with the ABS controller. It's necessary to cycle the ABS pump and valves with the scan tool to move air along to where it will be carried out of the system at the caliper bleed bolts. Generically, this involves holding your foot on the brake pedal while telling the scan tool to cycle the ABS, and then bleeding the system at each corner. The specifics of how different systems need to be treated are quite different. You'll need a shop manual and a scan tool for the correct procedure for your truck."

Does anyone know if this could apply to the LaSabre? If so, is there a way to get the brakes bleed without having to purchase the tool or take it into a GM repair shop?

Thanks in advance for your help.

Four Z's

I need the same info? Anyone?