Chevy & GMC Vans

Hi!
I changed my fuel pump, (it was dead) the next day I got a service engine light with a P1404 code (EGR valve stuck open or circuit performance). I cleaned the EGR valve, and reset the code but it came back, so I replaced the valve completely and I still get the code.
Scanner gives me the following information:

P1404GM
EGR Valve stuck open or circuit performance.

Fuel sys 1 = CL
fuel sys 2 = CL
Calc load % = 3.14
ECT(*C) = 89
STFT B1% = 0.78
LTFT B1% = 1.56
STFT B2% = 2.34
LTFT B2% = 1.56
MAP(kPa) = 40.00
ENG RPM = 845
Veh speed (km/h) = 44
MAF(g/s) = 5.00
TPS(%) = 0


someone gave me the scantool but he didn't have the software or book so I have no idea what some of the above means, if anything.
Any ideas where to look now?
Thanks
steve

You need to check the + power going in.... and the voltage coming out from your pump. How many miles on your pump?

I recommend changing at 100k.

The pump is new, has about 200 miles on it. The van has 88,000 miles. Pump died on the way to work, so I replaced it. (with the ac delco one)

Ooops, I meant to say begin by checking power and ground at the EGR valve.