One problem related to brake light on has been reported for the 1999 Chevrolet Blazer. The most recently reported issues are listed below.
Abs light came on, then brake light came on. When I tried to stop I almost rear-ended car in front of me because brakes were not properly working. Brake pedal was hard to push down. Happened twice within 4 blocks of my home and I have not driven vehicle since even though a mechanic told me it should still be safe to drive. I had new brakes (including parking brake repairs) and new bearings done less than 2 years ago. I spoke with a chevy mechanic who told me modifications had been made to 99 Blazer abs because of problems. We have owned this vehicle since late 1999/early 2000 (it had 16,000 miles when we purchased it) and have never received notice of this problem. We also have had additional problems with electrical system (dealer repaired), the wheel bearings as stated above, and the seat reclining levers breaking off (which dealer repaired once but then would not repair again). While checking the internet regarding this problem I found reference of a recall for the abs in 1999. I do not believe it was corrected on this vehicle and also there was no mention of recalls when we bought it from the dealer in 1999/2000.