will reduced engine power show if power steering system momentarily out of fluid?

What is your question?

the brakes were acting "spungee" , and within a 100 or so miles the power steering pump started growling, so I change the leaking power-brake line. i topped it off, and now there is no throttle response, and the "REDUCED ENGINE POWER" is displayed. I worked the steering wheel back and forth to get air out. Still no throttle response. s

What makes this problem better or worse?

just started after changing changing hose

How long has your 2006 GMC Sierra 2500 HD had this problem?

a few days