P0756 Chevrolet -

Question

Took my Suburban in for service. Check engine light was on and various codes were coming up. NOT P0756. Tech said the transmission pan seal need to be replaced. After that was done among other things they took it for a test drive and the p0756 came up. Now they are telling me I need a new valve body??
Seems to me like they must have done something in the initial repair.