WHERE ARE & WHAT SIZE ARE THE FUSES IN A 2008 GMC ENVOY FOR THE CIGARETTE LIGHTER & CELL PHONE CHARGING PORTS

If possible, pull the horn relay, use jumper wire on switch side of relay, right side in diagram. If the horn sounds, it's not the fuse. Sometimes these diagrams don't post, for some reason? good luck

As above:)

Maybe it's the cigarette lighter? Try it on another car and if won'r work, simply buy a new cigarette lighter.

use the owners manual to locate the fuse and replace it with same size fuse.

Fuse number 13 is the cigarette lighter fuse, it is in the engine compartment fuse box on your GMC Envoy. To know more about where each fuse is and what it does, follow this link: https://fuse-box.info/gmc/gmc-envoy-2002-2009-fuses-and-relay

Its common for cigarette lighters to short out and need to be replaced that's my thought they are easily replaced if you don't use it have it perminantly disconnected.

I think only the lighter and obd are on that circuit. But, the 2 amp fuse is much, much too small for the lighter, or anything else for that matter. Replace the fuse with a 30 amp fuse, and try the code reader again. If the fuse continues to blow, replace the cigarette lighter assembly.

You likely have a blown fuse. I have heard using the cigarette lighter for charging your cell phone can blow the fuse - was told to use the charger inside the center console for charging my cell phone.

As long as you use a slow charg device, yes. Rapid charge devices will blow the fuse or at worst can cause a fire.

If I remember correctly if you look at the back side of the fuse cover, it should tell you what the fuses are. Also in the owners manual in the index, under fuses, it should give you a diagram of the fuse location for the acc. outlets. Good luck. The fuse should be a 20 or 25A fuse.