One problem related to defogger has been reported for the 1999 Buick Regal. The most recently reported issues are listed below.
I have had five or six failures on this part on my two 1999 Regal GS. Would of been mor but I wait until display fades more until I replace. Dealer is aware. Factory is aware. I have extended warranty, so it is free. People on youe site had to pay $600. 00. This will cause an accident because you can not tell what is set in the hvac. If you need a constant heat and defog you can not tell. No display. Have to put hand to tell on vents. Gm ignoring the problem! not being able to tell if you are in defog is a safety issue! mr.