No heat in 1997 Monte Carlo 3.8 and won't switch from defrost setting
http://montecarloforum.com/forum/monte-carlo-repair-help-8/air-blows- out-defrost-only-15355/ -- check this out. You probably have a vacuum leak.
Search Chevrolet Monte Carlo Questions
Chevrolet Monte Carlo Experts
Related Models For Sale
Used Cars For Sale