Ive had this 97 grand prix for about 2 weeks now.It starts good,shifts decent,and seems to run ok.It does have quite a few things that need fixing and maintainance on.I was already aware that the gas gauge in the cluster did not work and what it was going to take to fix it.Now it appears i have another cluster issue,the RPM gauge apparently is working when it wants too.Most times the gauge goes up and down as you give it gas,but on one whole trip it never went off of zero(and we know it should at least be on the 1 while its running).So does it sound like replacing the cluster itself will fix that,and how hard is this to do?How much cost?