speedometer on a 91 silverado 1500
 

I have a 1991 silverado 1500 the speedometer won't work I replaced gauges and the speed sensor and still no speedometer. but the odometer works it about every 40 miles it turns 1 mile on the odometer if anyone can give me any info plz do

Welcome to the forum.:) You replaced the VSS which is the basically the pickup coil part. You may want to pull it and then check to see if the tooth ring inside the transmission isn't loose.