tommyk90 5,000+ posts
THE WHOLE THING!!!
You don't want that.the auction iposted is for a refurb'd dash
You want a new motherboard.
http://cgi.ebay.com/ebaymotors/1989-1993-S10-S-10-BLAZER-DIGITAL-DASH-SPEEDOMETER-MB_W0QQcmdZViewItemQQcategoryZ33678QQitemZ8072641747QQrdZ1
^^^That is what you want.