I have read the computer will not operate correctly when battery voltage hits around 10.5v.(not sure how true this is) I just replaced both batteries because the old ones were definatly starting to die out and the truck would barely start. Now that i have replaced them the truck does start better but it still seems to be having a hard time. I noticed the battery light blinks while cranking(i dont think it did this before) and the voltage while cranking drops to 10.5. Brand new 850 cca interstates. Any idea what the problems could be? Starter/solenoids? im not sure how these die out on these trucks.. if its like a steady problem that worsens or if they just flat out stop working... any suggestions will help
i noticed it is worse when the truck is cold.
Bats charge at 13.9v