[cootermax]

06 lbz won't crank sometimes. new batts good connects starts great 75% of time. sometimes after glow plugs light it won't turn over. sometimes have to hold key in start pos. 3-5secs then it will go. sometimes turns over ruff like low voltage.bone stock 181,000 miles xcab sb 4x4 2500 auto

 

[Tow Master]

Welcome to the forum! :drink

My buddy is a GM tech and his dad has a 06 dump truck. It does the same thing and he cant figure out what it is. Just does it every once and a while

 

[Markymark]

the ignition swith wore out in mine, try a new one or bi-passing to see if it works.

 

[cootermax]

fixed

starter wire loose . to much gravel roadin i guess