Hello, I have a 2004 Tahoe with 220K miles. It has been a few years since I've towed a boat with my Tahoe. Never had troubles previously. I recently bought an older Sea ray (3500 lbs). When I load/unload the boat it has been very difficult to get the vehicle out of park and I'm afraid I'm going to get stuck there. I have read about failing Solenoid switch (forums) and Torque lockout (from the manual). My brake lights work. I don't have any other trouble than on an incline with some serious weight. It is possible my battery is not pulling what it should, maybe that's it???? Not sure what to troubleshoot first. Thoughts???