well bought this car from an auction at a good price at only 2,300 bucks with low miles and its very beautiful but the speedometer did not move when i drove it off the auction.i took it to and electrical mechanic and he scanned it and looked for the problem.he told me that it can be either the whole speed cluster or the body control computer module.i already changed the cluster and did not fix it,now i tried a body control module witch i found and bought off a used Camaro because new is way to pricey for me.installed it and the car wont star with it just says on cluster security which means electrical mechanic need to work with it to match the cars computer .well i took the car to another electrical guy and found nothing wrong with it the cluster is fine the module fine the trans speedometer fine.what can it be anyone?also sometimes in the clusters it pops out check gauges and then comes off again it does this sometimes wich is telling me that the speedo is not working i guess.the check engine light is on all the time but thats for something else.any one have any idea what this can be or anyone with a camaro have the same problem?pls let me know what it is to fix cus the mechanic just cant find the problem.if anyone knows pls email me at mustang8790201@yahoo.com