Remote Solenoid question...

[amargari]

That only works if the starter is not a permanent magnet starter. Here is a quote from the PowerMaster web site.

Also, you can see their instruction sheet here:
http://www.powermastermotorsports.com/027___IS_PMGR.pdf

See question #7 here: FAQ-Starter
which says:
Why does my starter seem to "run on" after the switch is released?

This is a common complaint on Ford permanent magnet starters, although it can occur on any permanent magnet starter in the right conditions. This situation develops when the ignition terminal on the starter is "jumpered" to the battery terminal on the starter and a remote solenoid is used. Permanent magnet starters can actually produce power if they are driven from an outside source (i.e. the starter will act like an alternator once the engine fires and starts spinning). The current produced in the starter for this second or so will flow from the starter's battery terminal to the starters ignition terminal and hold the solenoid in. This will cause the one to two second delay in the solenoid release and an irritating noise. The solution is to wire the starter per the instruction sheet, which will ensure that the ignition switch terminal goes dead the instance the key is released.

Not sure if the newer GM starters are a permanent magnet design.