Overcharging or Ground Issue?! Truck going haywire

[Doctor Cowen]

2018 Silverado 3500 High Country. Truck is having serious electrical issues. Sometimes the dash and radio will just go black momentarily, “service stabilitrak” will pop up, dash dims up and down at night, and headlights dim up and down at night. Dealer says it’s voltage spike/alternator problem but batteries and alternator all test “good” Anyone else have this issue before?

 

 

[Yotaman]

Do a search for G218 Ground. It may fix ya up.

 

Yotaman

[Supreme Pizza]

Overcharging?

 

Well the overcharging issue has been a problem with the dealerships from day one.

 

 

[doverarjim]

See my past post about problems, radio would not work, truck would not start, finally after about a year of using a jump box to start my truck at least once a day had battery short out.  Dealer replaced both batteries and I have not had a problem since!!  Just my $0.02 worth.