So my truck has had no issues until yesterday morning. Parked it Friday nite and was fine. Went to go to work yesterday morning and it was like the batteries were weak and it took a while to start...when I got in it to come home from work I had to cycle the key twice to get it to start. Could the GP relay be going out. I did have it replaced about 5 yrs (40k) ago. Also had the GP's replaced at the same time.
The only thing I did this weekend is turn the key in the ignition to put it in gear to move it forward a few feet w/ out starting it.
Just had the truck serviced and everything checked out last month and they said both batteries were in the high 80%. I think the batteries are about 4 yrs old.

 

When mine did that it was a weak starter. It checked OK at autozone but don't believe that!