I have my trailer stored for winter and plugged in for a week at a time. Over that course of a week I noticed my back slide keeps creeping out about 3 inchs. Any ideas what it could be
If hydraulic, try a little purge before you go to the shop. Run out, hold for a 3 to 5 count, run in hold, out hold and back in. This has worked for me, and the slides stay in. If it does not work, you have lost nothing but a little time.