99-05 LS1/LSX ECM Amp Draw?

[VORTECMAX]

I have a Benchtop programming harness that I bought...and I need to know which power supply to use for the LS1/LSX 99-05 ECM's. There are a couple of different one's available. All of them are variable voltage from 9-24 volts. THEY ARE NOT VARIABLE AMPERAGE

1) 9v-24v *3amp*
2) 9v-24v *5amp*
3) 9v-24v *10amp
4) 9v-24v *15amp
5) 9v-24v *20amp
Which one should I get? Does anyone know what the AMP draw is on the ECM? I don't want to get the wrong power supply and screw up the ECM...

Thanks in advance

[EC_Tune]

12.5 Volts and it should not be above 5 amps on a bench harness ever.

[VORTECMAX]

Thanks alot!!! I was nervous on buying the wrong one.....

[EC_Tune]

You really can't go wrong with a 10 amp supply.