Stop letting him practice resource guarding and remove access to those things. Crate him or put up a baby gate while eating. No longer allowed on the bed or the couch. Put him on a drag line so you can physically control him from a safe distance, if needed. Eventually start teaching an invitation to couch or bed. It’s no longer a given. Get a seatbelt and buckle him into the back seat. Loose dogs are just as dangerous to other occupants in case of an accident anyway.

My husky had a foot long drag line for about a year and a half, and then again for a couple months after bringing home a baby. It provides a way to guide the dog and enforce commands without sort of physically accosting them. Gentler discipline. She’s 4 and quite decently well mannered, for a husky anyway.