tech question, not for a blazer, but another g.m. product.
 

i do some minor mechanical work on the side and today i was doing a tune-up/oil change on a 2000 buick century sedan with the 3.1 , it has a digital odometer and along with it the shift selector indicator (PRND21) are not working, you cant tell what gear your in visually, and you cant tell how many miles the car has on it. all the fuses are o.k. and from what ive found online its a circuit board problem with the dash cluster. anyone else ran into this? everything else appears to work, it does have a c.e.l. and abs light lit up (dad has his code scanner right now, so i wasnt able to see what the c.e.l. was about)

these digital clusters love to mess up after a while even the ones in the blazers screw up

Mine did and i got it repaired works like new now

And .. again.. search is your friend:
http://www.google.com/search?q=blaze...lazerforum.com

https://blazerforum.com/forum/2nd-ge...d%2A%2A-16911/

Probably pretty much the same.