2014 TRD brake & elec issues

Hi,
I purchased a used preowned certified 2014 Tundra TRD dbl cab 6.5' bed with 62,000 mi's
In 5 months I've put 4,000 miles on truck. 60 miles a day of which 4-6 miles are on dirt in
4 hi.
1) I'm feeling the brakes when slowing from 60-80 down to 20-30 mph
It doesn't feel like the abs on my Old GMC. It feels more like the pads are slipping, but not smoothly. Any thoughts or advice would be great .

2) the seat belt buzzer and dash light are starting to do weird stuff and basically not operate
Correctly.