One problem related to brake fluid has been reported for the 1999 Oldsmobile Alero. The most recently reported issues are listed below.
While aplying brakes pedal would slowly go to the floor if you pumped it it would come back and pedal presure felt mushy. While gotng down a hill, pedal went to the floor. Took to GMC dealer and he said brake fluid was contaminated and warranty wouldnt cover repairs. It cost 2100$ to fix it this car has only been seviced at GMC dealers brake fluid had a greenish couler to it . Insurance adjuster took a sample idont no the results of it.