Where is orifice tube in 1993 Buick Sabre?

The orifice tube in a 1993 Buick Sabre is located within the air conditioning system's high-pressure side, typically near the receiver/dryer. It's not easily visible without removing components of the A/C system. You'll likely need to access it from under the hood, near the firewall, but its exact location will vary slightly depending on specific model variations within the 1993 Sabre line. A repair manual specific to your vehicle's year and engine would be the best resource for precise placement.