99 Silverado 2500 Gauge problems

My 99 2500 silverado (new body style) started having problems about a month ago my ABS light would come on with the truck in 4x4, then one time the light came on and then the temp, trans temp, and fuel guage stopped working and the info center lights started cycling threw (low fuel,bat,low washer,and security. once the lights came on they stayed on in 2 or 4 wheel drive, took to dealer and they said it was the EBCM, ABS worked fine and pump is not running so I unpluged the EBCM and the guages all went back to normal but the ABS light is on. If anyone has had this problem and knows what the true fix is could you please let me know I would realy apprecate it thanks Ryan