Shop OEM GENERAL MOTORS Part # 22521772. HVAC Pressure Switch. All Models; 3.0L, 3.8L; 4.3L Diesel. Buick, Oldsmobile; Diesel; w/Low Pressure. Diesel w/AC, low pressure. Air

3. 1L; ALL. 3. 1L; W/AC. 3. 1L; W/O ac. 3. 8L; 4. 3L Diesel. 3. 8L; Hvy Duty Cooling. 3. 8L; Standard Cooling. 4. 3L; W/AC. 4. 3L; W/O ac. All Models; 2.2L. All Models; 2.5L; Standard Cooling. All Models; 2.5L; w/AC & Heavy Duty. All Models; 2.5L; w/o AC. All Models; 2.8L; w/AC. All Models; 2.8L; w/Curved Blades. All Models; 2.8L; w/o AC. All Models; 2.8L; w/o Curved Blades. All Models; 3.0L; w/AC. All Models; 3.0L; w/o AC. All Models; 3.1L; Leaded Fuel. All Models; 3.1L; Unleaded Fuel. All Models; 3.3L; Heavy Duty Cooling. All Models; 3.3L; Leaded Fuel. All Models; 3.3L; Standard Cooling. All Models; 3.3L; Unleaded Fuel. All Models; 3.3L; w/Guard. All Models; 3.3L; w/o Guard.

3.8L; 4.3L Diesel. All Models; 3.0L.