stall and restarts while driving

2005 4500 · 2022-05-14T14:09:13-0400

2005 gmc 4500 topkick;; stalls and re starts when i hit a bump in the road with no DTC codes ?? progressively getting worse!!!!

OpalLacod · 2022-05-14T14:30:50-0400

Sounds like a loose ground or a bad battery cable. Any other electrical issues when it happens?

RayVoy · 2022-05-14T15:14:42-0400

I had that problem with a car years ago, it was a bad battery.

The battery had a broken plate.

2005 4500 · 2022-05-14T16:39:48-0400

OpalLacod said:
Sounds like a loose ground or a bad battery cable. Any other electrical issues when it happens?

happened again today.this time the truck went into limp mode ,25 mph all the way home,

OpalLacod · 2022-05-14T19:18:16-0400

Define "stalls", please. Engine cuts off? RPM surge with loss of movement?

2005 4500 · 2022-05-15T01:20:42-0400

turns off then back on,,like cycling the key while driving,,

RayVoy · 2022-05-15T10:17:40-0400

Your loosing primary power or ignition.

Do you have a multimeter?

2005 4500 · 2022-05-15T19:15:26-0400

RayVoy said:
Your loosing primary power or ignition.

Do you have a multimeter?

yup

2005 4500 · 2022-05-16T17:52:54-0400

RayVoy said:
Your loosing primary power or ignition.

Do you have a multimeter?

yes