WestVdiesel
New Member
ok guys i have a 98 gmc sierra 2500 6.5 f vin 4x4 i got off work this morning let the truck warm up for a little bit drove like 2 miles to my destination i was sitting in the truck with it idleing all the sudden i watched my viltage drop and continue to drop then everything just shut off like someone unhooked the battery truck has all new ignition switch so i turned the key off then back on glow plugs cycled on everything seemed to come on as ususal then same thing happens again so i wait another few seconds turn it back on and truck fired right back up volts went right back to where their suppose to be any i deas on what the cause would be?