ok just replaced lift pump a couple of days ago,every morning since truck drags when you try to start it, once it starts the overdrive light come on. so i cycled my ingition, got codes,0645,1693. truck still has plenty of power what gives?

 

0645 A/C Clutch Relay Circuit
1693 DTC Detected In Companion Module, DTC Detected In PCM/ECM

 

what is dtc is this aproblem or can u resett it?

 

DTC Diagnostic Trouble Code
My guess, if you fix the 0645 the 1693 will disappear also.
Did you bump or pull any wires while replacing the lift pump?