i need some help my speedo dosen't work i know the three main things to check are cluster speed buffer and sensor on tranny (which i replaced last fall) so can any one lead me as to what the speed buffer looks like? i think ifound it by the computer on passenger side but don't know. also ive heard that if you pull off needles it messes with the "calibration of the speedo and ive also heard that it dosen't so what is the truth.

please help its all thats left until it goes back on the road for some spring/summer fun until snow hits again.

 

Pretty sure only the TBI cars use a buffer box.

 

i looked in alldata at school and found out that what i pulled out was the vss speed buffer it is the little black box behind the computer on passenger side.

 

Thats not the vss buffer. It should be a yellowish plastic box, but your car shouldn't have one. The functions of the vss buffer are built into the ECM on Tuned Port cars. I know this because I went through it with mine.
Mine's an RS, originally TBI, but when I swapped to TPI the speedo quit working. I had to bypass my buffer box to get it to work.
I would check your sensor, make sure its got a good connection, then check the wiring for any frays or what not. Then move on to your cluster.

Dave

 

Did the speedo quit working after you replaced the vss or was it still dead? If dead, are you sure you have the correct one installed? The only way to know for sure is to cross check the vin and vss with the GM parts dealer.