Nice going John.
We'll expect some pictures!
Batteries are only good for 3-5 years tops, unless you have an Optima which last longer. So, best to replace it. Good time to check the charging system also.
Not sure what truck you purchased or if it's a 6 vs 12 volt?
In any case, good luck. With any of these trucks, you will find you need to turn a wrench or two. That's half the fun!
