Speedo issue

[jsbihn]

Ok guys, PLEASE tell me there is a way to fix this or at least a cheap way to fix this. Today I was driving and I looked down to see I was doing over 120 mph. I realized the speedo was screwed up because there was NO WAY I was doing that. Sure enough I get to my destination, shut off the truck and the speedo said 60mph. Yep parked I am doing 60mph :-p

So i start to look up on my phone what the issue is and of course it is a known issue. It seems this is so known that alot more then just HUmmers have it but GM wont recall them they will just do a service on them up to 80k. Well I have more then 80k on my truck so that means GM is saying screw you to me. So now I need to find out how I can fix this on the cheap.
I have read that this is a 700 dollar fix, to which I dont have that right now to fix the speedo, especially since so many other H2 gremlins have invaded my truck.

Please help.
Thanks