Well I notice a speedo lag as well!! Wtf, why does this happen and can anything be done about it??I guess the speedometer needle is moved electronically through a sensor attached to wheels?? Anyway I wanted to know if there is a plug in device/computer that can be used for 0-60, 1/4 miles, 60-100 etc... And how much is it

 

Interceptors or HP Tuners.

HP tuners is like 500$ and an interceptor guage is like 200$

 

Don't think there is a fix for speedo. There is a g-tech computer that plugs in and records a bunch of stuff, 1/4 1/8 0-60 0-100-0 , but no 60-100 and no 0-100. Price about 2 bills. Then the aeroforce computer does same thing I think but for about 375. I could be wrong though....and speedo lag? Cobalt is prob the only car that has that problem lol, another gm shortcut to save a few bucks

 

Save a few bucks? The software to run that speedo cost more than a cable would, have lol.