OE Quality
60-Day Returns

Universal Air CK4842 A/C Compressor Kit
Universal Air CK4842 Short Compressor Replacement Kit
Universal Air CK4842 is a short compressor replacement kit for select rear A/C applications that need a complete compressor-side service solution. It is built for the 2003-2006 Chevrolet Trailblazer EXT, 2003-2006 GMC Envoy XL, 2003-2006 Isuzu Ascender, and 2009 Chevrolet Trailblazer with rear A/C.
Key Features
- Short compressor replacement kit for HVAC A/C clutch and compressor service
- Fits rear A/C applications on select Chevrolet, GMC, and Isuzu SUVs
- Complete kit includes CO 4911AC, EX 5612C, EX 5900C, and HA 10487C
- Recommended for use with a new condenser during repair
- Part number CK4842 for easy ordering and catalog matching
Application Details
Compatible with 2009 Chevrolet Trailblazer, N/A, with rear A/C; 2003-2006 Chevrolet Trailblazer EXT, N/A, with rear A/C; 2003-2006 GMC Envoy XL, N/A, with fixed orifice and rear A/C; and 2003-2006 Isuzu Ascender, N/A, with rear A/C. Universal Air CK4842 is the correct choice when servicing these vehicle-specific HVAC systems and replacing compressor-related components as a matched kit.
Common Repair Uses
- Restoring A/C performance after compressor failure
- Addressing poor cooling in rear A/C-equipped SUVs
- Replacing worn compressor-side components during HVAC repair
- Correcting contamination concerns after system damage
- Supporting a more complete repair on Trailblazer, Trailblazer EXT, Envoy XL, and Ascender models
Installation Notes
Before installation, verify the vehicle’s rear A/C configuration and confirm the application details against the existing HVAC layout. The notes for this kit call for replacing the condenser with a new condenser, which is important when repairing a failed compressor system. Part number CK4842 should be matched to the vehicle exactly as listed for proper fitment.
Quality Assurance
Universal Air CK4842 is cataloged as a short compressor replacement kit for the listed applications and is identified by the included component references for accurate parts matching. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
This part fits 18 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2009 | Chevrolet | Trailblazer | LT | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2006 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2006 | GMC | Envoy XL | Denali | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2006 | Isuzu | Ascender | LS | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2005 | GMC | Envoy XL | SLE | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | GMC | Envoy XL | Denali | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | GMC | Envoy XL | SLT | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | Isuzu | Ascender | LS | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | Isuzu | Ascender | Limited | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2005 | Isuzu | Ascender | S | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2004 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2004 | GMC | Envoy XL | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2004 | Isuzu | Ascender | Limited | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2004 | Isuzu | Ascender | LS | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
| 2003 | Chevrolet | Trailblazer EXT | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2003 | GMC | Envoy XL | 5.3L | V8 | N/A | with Fixed Orifice; with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit | |
| 2003 | Isuzu | Ascender | 5.3L | V8 | N/A | with Rear A/C; Complete Kit Includes #(s) CO 4911AC,EX 5612C,EX 5900C,HA 10487C; Recommend replacing condenser with new condenser; Short Compressor Replacement Kit |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.