2018 Sierra 1500

Tyler Roderick · May 1, 2020

2018 GMC Sierra 109000 Miles. All symptoms of a dead battery. Tested battery fine. Tested alternator, fine. Starter read low amps? But truck would jumpstart. Now when trying to jump. Voltage meter in dash doesn't even hit 14 v when hooked to another running car

lonestardiver · May 1, 2020

Check your battery cable and ground connections.

JimCost2014 · May 3, 2020

On 5/1/2020 at 5:30 AM, Tyler Roderick said:

2018 GMC Sierra 109000 Miles. All symptoms of a dead battery. Tested battery fine. Tested alternator, fine. Starter read low amps? But truck would jumpstart. Now when trying to jump. Voltage meter in dash doesn't even hit 14 v when hooked to another running car

Welcome to the site.

Who tested your battery? Factory batteries have a very short life span, and you have quite a few miles for a 3 model year truck, I would replace it just to be safe, otherwise you are going to experience a lot of odd electrical things going forward.