The c0265 is the EBCM concern, this is a common issue on this truck. You can drive it like this but you will not have ABS braking. If you are going to drive it like this, then its best to remove the large ABS fuse in the under hood fuse box. If the module shorts, the ABS motor will stay on all the time and drain the battery.
There is a cheaper fix for this issue, you can remove the module and send it out to have it repaired. The module is held on with 4 torx bit screws and it comes off. Here is a website that can repair the module for you.
The price for the rebuild is $130, they also have some information on how to remove the module, your is located under the frame just under the drivers seat area.