Four Seasons 77548 rear A/C compressor for the 2006-2009 Chevrolet Trailblazer and other vehicles pumps and pressurizes refrigerant to run the air conditioning system. This remanufactured Four Seasons A/C compressor is a Sanden TRSA12B unit that comes with its clutch.
- Tested 100 percent for compressor function and noise level
- Pre-charged with 3 ounces of PAG oil for R134a or R1234yf applications
- Vacuum and pressure tested individually to check for leaks
- Sealing washers and O-rings for R12, R134A and 1234yf systems supplied
- 12-volt DC clutch coil and a 4-groove serpentine pulley
Quick facts
- Part: Four Seasons 77548 A/C compressor
- Fits: 2006-2009 Chevrolet Trailblazer and other vehicles
- Position: Rear
- Condition: Remanufactured
Warm air from the vents, a loud compressor or a clutch that stays still can mean a worn compressor, but other parts in the system produce the same signs. With the engine off and cool, look over the compressor, its fittings and the belt for oil residue or damage before replacing anything. The air conditioning needs one compressor, and this listing is one.
Fits
This remanufactured rear A/C compressor is a direct-fit replacement for the 2006-2009 Chevrolet Trailblazer, the 2005-2009 GMC Envoy and the 2005-2009 Saab 9-7X. If your car is not one of these, open the "Vehicles it fits" section and look up your exact model and engine.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 1
- Mounting type: Tangent mount
- Outside pulley diameter: 3.875 in
- Pulley grooves: 4
- Outlet C length: 98 mm
- Coil voltage: 12 V DC
- Connector type: Pin
Build and materials
- Condition: Remanufactured
- Compressor type: Sanden/Sankyo
- Refrigerant type: R134A
- Compatible refrigerant oil type: PAG 46
- Pulley belt type: Serpentine
- Clutch and switch: included, with a heat sensor
- Country of origin: Mexico
In the box
One remanufactured A/C compressor with its clutch and heat sensor switch. Mounting hardware is not included, so plan on new bolts rather than reusing old ones.
Installation notes
- May require use of the OE connector.
Frequently Asked Questions
Is this an A/C compressor for the 2005-2009 GMC Envoy?
Yes. Four Seasons 77548 is listed for the 2005-2009 GMC Envoy.
Does the Four Seasons 77548 come with the clutch and sealing washers?
Yes. Four Seasons 77548 includes the clutch, the heat sensor switch and one each of sealing washers 24355 and 24354. Mounting hardware is not included.
Is the oil already in this Four Seasons compressor?
Yes. This compressor comes pre-charged with 3 ounces of PAG oil for R134a or R1234yf applications. The compatible refrigerant oil type is PAG 46.
How is this remanufactured compressor tested?
Each unit is tested 100 percent for compressor function and noise level to meet or exceed OE specifications. It is also vacuum and pressure tested individually to check for leaks.
How many grooves does the pulley on this rear A/C compressor have?
The serpentine pulley has 4 grooves and an outside diameter of 3.875 inches.
