Yes. See below.
If your asking about aux. channel output amperage, the simple answer is... not enough to power a pump.
Amperage breakdown per channel (yes, you can reassign ignition and injection channels to aux. duty)
Injector channels.... 10.2A peek w/2A hold
Ignition.... 2.2A
LS1 & LS2.... 2.2A
LS3.... 3A
LS4 trhough LS7.... 1A
All HL channels.... 1A
More than enough for automotive relay's (typically ~.250A), but not enough to direct drive a pump.
Yes. Or you can use one of the HL channels and pull it high. Its up to you.
Here's an example...
First, determine which channel you want to use and wire it to a relay. Lets use Aux LS1
Second, go to CONTROL/GENERAL PURPOSE OUTPUTS/GENERAL PURPOSE OUTPUT 1, assign a name (not mandatory, just for reference), turn the activation to "On", and select the aux. channel you wish to control.
Third, go to CONTROL/GENERAL PURPOSE OUTPUTS/GENERAL PURPOSE OUTPUT 1/GPO SWITCH POINT A, select Activation By: Boost (more on that in a bit), Switch Point: 2.4 PSI, Hysteresis: 1 PSI (boost must drop 1 PSI from the switchpoint, before pump will switch off, 1.4 PSI in this case), Output Polarity: normal. This means pin is off below the set threshold and on above it. Opposite polarity would turn the pin on below the switch point, and off above it.
Back to Activated By... you can activate an output based on many different things. For example... RPM, engine temp, engine run time, battery voltage, any other Aux. channel, vehicle speed, throttle position, etc, etc, etc.
Hope this helps.