Originally Posted By: Merkava_4
I use 10W-30 above zero degrees Fahrenheit because I think it's more durable than 5W-30.
I do the same. 5w30 in Winter - and 10w30 in summer. I live in Wyoming where it gets real cold..
Originally Posted By: Nate1979
Lots of people with GM trucks install the 2nd battery. Should be a number of how to threads on the GM truck boards. The best thing you can do for the health of your battery is to keep it charged fully with a good quality charger. Whether you install a 2nd battery...