[AngryMallard]

Also I was thinking if you knew anyone else with a truck matching yours, you could borrow their cluster for a test drive and see if it works. Then you know if it's your cluster broken or something else. Maybe your friend's truck even has a tach that you can experiment with. If another cluster works then you can pay for one for your own.

 

[AngryMallard]

In order from highest price to lowest price you could order a cluster from the dealer, find one on ebay or craigslist, get it from a junkyard, or borrow one from a really really good friend who has a truck like yours.