slow drag cranking

[dmilliner03]

Hello From Phoenix AZ.

 

[Burn Down]

Welcome!

Ck the batteries and ground connections.

 

[gmac32]

Starter maybe. Give us some info on the truck.

 

[TheBac]

We cant even begin to guess without info. Hell, what year truck? How old batteries? What mods have been done?

 

[Ron Nielson]

This thread might be of some help to you: https://www.duramaxforum.com/forum/07-5-10-lmm-duramax-powertrain/985435-intermittent-major-electrical-issues-08-lmm.html

 

[Ne-max]

Can be 3 things. Starter, Batteries or bad connection/wire.

 

[gmac32]

I would check the grounding strap from the engine to the cab. I believe it attaches to the passenger side firewall. When I pull cabs on these trucks before, i forgot to hook that strap up and had the same symptoms you have. I just replaced a starter on a 2011 be a use the starter would drag bad. Changed it and it fixed that problem.