ArbutusWasabi

Will do, thank you!

Apologies in advance if this is already covered in other threads. My Silverado is my extra vehicle, so it gets minor use but gets worked when I use it. It has 63k miles and has been a solid vehicle since I bought new. In the heat of last summer the A/C failed occasionally. If I turned the A/C on while at highway speeds it worked fine. If thectruck had been sitting and I started to drive with A/C on, the dash voltage meter would take a dive below the "acceptable" range and the A/C would blow hot air. If I turned the A/C off and drove a bit, then turned the A/C on while at speed the volt meter would drop a little but the A/C would slowly get colder and then work fine. If the A/C was already on and working properly, and I idled the truck for an extended period the A/C had no issues blowing cold... I have done the A pillar ground (both sides) cleanup and also cleaned the main battery ground where it attaches to the cab and engine. Truck has an AGM battery that is fairly new. A/C is fully charged and alternator is working fine. Any experience with this issue? Thoughts??