How long does it replace/fix the ECM module and how much should I pay on 1993 Chevrolet Suburban 2500

I have a 1993 Chevy Suburban 2500 that has a bad ECM module and it has been 3 weeks now but not fixed so how much time should it take to fix/replace and how much should it cost me.

Asked by for the 1993 Chevrolet Suburban 2500
coulod go from 400.00 to 600.00 depending on part #
1 more answer
How long and how much will vary depending how your car is equipped and availabilty of part. Actual work take a couple of hours most the time being spent on down load of software program into new module and resetting theft system. Average cost probaly around $600. Iam curious as to reason you think the module is bad. I am in Richmond should want to call and discuss.