2000 suburban abs/brake and speedometer
 

hey everyone i ma having problems with my 2000 suburban 4x4 new body style lt. my abs and brake light stay on and my speedometer is very erratic. this is what i have done trying to fix the problem. cleaned all grounds (front bumper, behind engine block, and ecbm under driver door) replaced both left and right front abs speed sensors, replaced vss on transfer case area. unplugged the computer and ecbm and replaced connections and tomorrow i will be replacing both battery terminals. i am going nuts with this:mad:. have no clue and dont really have the cash to take it to the dealer. no check engine light atm. anything else i need to check?

it is possible that the entire cluster is bad. it does happen with these trucks, especially if your speedometer has stopped working while driving, shows the wrong speed, and seems to get stuck