Two problems related to manifold/header/muffler/tail pipe have been reported for the 1997 Chevrolet Blazer. The most recently reported issues are listed below.
Intake manifold gasket failure on a 1997 chevy Blazer lt. Leaking large amount of coolant, water pump failure leaking large amount of coolant.
In November I took my car into the chevy dealer and had the intake manifold gasket replaced. A month later my engine (4. 3l v6) was dead, as a result of dexi-cool in the block. My chevy dealer's service dept. Wanted $5000 for a new engine. I donated the car to charity.