when I am driving this "sys" flashes on my display. If I have any gauges such as instant miles or range or fuel this "sys" will flash 3 times and then display whatever i have selected at that time. What does the "sys" mean?

 

If you have an aftermarket radio, it can cause the CCM to set error code 72. If that's the case, the SYS light will continue to flash until you install a resistor in the Dimming control line to complete the circuit.
I have a aftermarket radio and I get the sys flashing.What size resister do you use?

Also where does the resistor get installed?

 

Here are the insructions I had my installer use:

1. Buy (2) 1 kilo-ohm 1/2 watt resistors. [Radio Shack part # 271-023. They sell them as a 2pk for .29 cents.]
2. Disconnect the negative battery cable.
3. Remove the receiver.
4. Connect one end of both resistors to ignition power. (Yellow wire in the car)
5. Connect the other end of one resistor to the purple/white wire in the car.
6. Connect the other end of the second resistor to the grey/black wire in the car.
7. Cover all connections and completely cover the resistors.
8. Reconnect the negative battery cable.

 

I hope this works. This problem has been bugging me ever since I bought my car 5 years ago!

https://www.corvetteforums.com/m_304...y_/tm.htm#3049

https://www.corvetteforums.com/fb.asp?m=6545

 

Just searched that part number and found nothing. Even Called the local store.
Is this the same thing maybe???
http://www.radioshack.com/product/in...entPage=search

 

Yep, thats it. I had to buy the 5 pack also.