One problem related to check engine light on has been reported for the 1997 Chevrolet Blazer. The most recently reported issues are listed below.
When I bought the truck, it had a 3,000mile 30 day warranty on it, 60000miles. 1st occurrence with engine light and dipstick corrosion was within that time. Down time for the truck one week. The next month, I was enroute and the light triggered again. Took truck to local chevy dealer who had looked at dipstick before replacement, stated same dipstick. At this point I called Chevrolet company who told me the $1800 damage bill caused by the defective dipstick and subsequent transmission damage would be mine to cover. All because it was under warranty and should have been fixed the first time.