I ran into this problem and it was the sediment from the zinc element in the hot water heater clogging up the valves in the kitchen sink. I replace the anode, used the wet dry vac to clean out the hot water tank (with a piece of silicone hose attached to the end of the vac to reach up into the tank) and used this as an excuse to replace the faucet with a Pfinster unit. Water flow was restored.
I took apart the old faucet and found the sediment in the valve units on the sink. I could have probable cleaned this out and been ok, but the new faucet looks nice.
2008 Toy Tundra DC 5.7L Bagged w/LTs
2012 Windjammer 3001W, Atriumed