Purchased this dishwasher 2007, had the motor or pump replaced in 2008 because it developed a loud whining noise. Now it is making the same noise again. I suspect the motor/pump needs to be replaced again? Are instructions available? I beleive it is out of warranty.
Here are your parts
Replacement parts for WHIRLPOOL GU2700XTSQ1 | AppliancePartsPros.com
Here is the tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%20W10130990.pdf
Here is a manual that I believe uses the same pump as yours
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/52521bdbd0ef763c85256cbc00520548/$FILE/8178022.pdf
Be sure to check the chopper area just in case something in there is causing the noise.