Cold start issue

[HistoricHouseGuy]

Seems to be a common enough problem this time of year. sure the experts are tired of being asked.
I too have a no start issue when it is 50 degrees or less. Plugged in the stock block heater and it starts fine. I do have wait to start light. One new battery other one year old. Both NAPA Legend 75 880 cca or there abouts.
GPR makes sense but not really wanting to go down the guessing game road.
Other posts suggest computer? Done the fuel filter change in the last month.
Have not done anything with the injectors in the 80000 m on the truck.
Thanks SCM

[510guy]

happened to me last year, one new and one older battery, plugged in she starts fine unplugged no start. got two new batteries and no more problem. i knew it would be the batteries though as the guy i bought the truck from said he only changed one.

[HistoricHouseGuy]

Thanks 510guy. Shop that put one battery in last year while Ias having a whole list of things done guess did not do me any favors. I am going to pick up another legend 75 and swap out last years. A spare battery for the tractor or winch ain't a bad thing.