Four Seasons 77561 A/C compressor for the 2002-2009 Chevrolet Trailblazer and other vehicles pumps and pressurizes refrigerant to run the air conditioning system. This remanufactured Four Seasons ac compressor is a Sanden TRSA12 unit with its clutch included.
- 100 percent tested for compressor function and noise level
- Individually vacuum and pressure tested to check for leaks
- Pre-charged with 3 ounces of PAG oil for R134a or R1234yf applications
- Clutch and heat sensor switch included
- Supplied with the R12/R134A/1234yf required O-rings and sealing washers
Quick facts
- Part: Four Seasons 77561 A/C compressor
- Fits: the 2002-2009 Chevrolet Trailblazer and other vehicles
- Condition: Remanufactured
Weak cooling, a noisy compressor or a clutch that does not engage can mean the compressor is wearing out. Before you replace it, rule out a refrigerant leak, a blown fuse or relay, and a loose or worn belt; a shop can test the system for you.
Fits
Listed for a wide range of Chevrolet, GMC, Saab, Buick, Isuzu and Oldsmobile models, it fits the 2002-2009 Chevrolet Trailblazer, the 2002-2009 GMC Envoy and the 2005-2009 Saab 9-7X, and each takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Outside pulley diameter: 3.875 in
- Pulley grooves: 6
- Pulley belt type: Serpentine
- Mounting type: Tangent Mount
- Outlet 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: PAG 46
- Clutch: included
- Switch: included, heat sensor
- Country of origin: Mexico
In the box
One remanufactured A/C compressor with clutch and switch, pre-charged with PAG oil, plus one sealing washer (24355) and one sealing washer (24354). Mounting hardware is not included, so plan on new bolts.
Installation notes
- May require use of the OE connector.
Frequently Asked Questions
Is the Four Seasons 77561 the right GMC Envoy ac compressor for a 2002-2009 GMC Envoy?
Yes. Four Seasons 77561 is listed for the 2002-2009 GMC Envoy, and that vehicle takes one compressor. If your car is not named on this page, look it up in the "Vehicles it fits" section.
Does the Four Seasons compressor come with oil and O-rings?
Yes. Four Seasons 77561 comes pre-charged with 3 ounces of PAG oil and includes the required O-rings and sealing washers. Mounting hardware is not included.
How many grooves does the pulley on this A/C compressor have?
The pulley has 6 grooves and a 3.875 in outside diameter, and it is listed for a serpentine belt.
What refrigerant and oil does this remanufactured compressor take?
This compressor is listed for R134A refrigerant, and PAG 46 is its compatible oil type. It is also pre-charged with oil for R134a or R1234yf applications.
How is this remanufactured compressor tested?
Each unit is 100 percent tested for compressor function and noise level. It is also individually vacuum and pressure tested to check for leaks.
