HomeHVAC > A/C Clutch and CompressorUniversal Air CO21578AC A/C Compressor
Part #: CO21578AC

Universal Air CO21578AC A/C Compressor

UAC MSC130CG1 Compressor Assembly
11 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$266.45Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
UAC MSC130CG1 Compressor Assembly
Fitment: Buick, Chevrolet, Pontiac, and Saturn, Terraza, Uplander, Montana, and Relay
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable A/C Compressor for Buick, Chevrolet, Pontiac, and Saturn

The Universal Air UAC MSC130CG1 Compressor Assembly (Part Number CO21578AC) is designed to restore efficient air conditioning performance in select GM vehicles. This A/C compressor is compatible with Buick Montana, Chevrolet Uplander, Pontiac Montana, Relay, Terraza, and Saturn models, providing a direct replacement solution for HVAC system repairs.

Key Features of the UAC MSC130CG1 Compressor Assembly

  • Direct fit for Buick Montana, Chevrolet Uplander, Pontiac Relay, Terraza, and Saturn models
  • Part Number CO21578AC ensures precise identification and compatibility
  • Designed for HVAC A/C clutch and compressor category
  • Manufactured by Universal Air, a recognized brand in automotive HVAC components
  • Meets OEM specifications for reliable performance and durability

About the UAC MSC130CG1 Compressor Assembly Product Line

The UAC MSC130CG1 Compressor Assembly is part of Universal Air's product line focused on HVAC A/C clutch and compressor components. This line emphasizes compatibility with a range of GM vehicles, offering assemblies that meet factory standards for fit and function. The CO21578AC compressor assembly is engineered to integrate seamlessly with existing vehicle systems, supporting efficient cooling and system longevity.

Detailed Product Description

This A/C compressor assembly is engineered to replace the original compressor in Buick Montana, Chevrolet Uplander, Pontiac Relay, Terraza, and Saturn vehicles. The CO21578AC part number corresponds to a compressor designed to maintain proper refrigerant flow and pressure within the HVAC system. Its construction supports consistent air conditioning performance, helping to restore cabin comfort during warm weather conditions. The compressor assembly is built to meet the mechanical and electrical requirements of the specified vehicle models, ensuring compatibility and ease of installation.

Common Issues Addressed by This Compressor Assembly

  • Loss of air conditioning cooling efficiency
  • Unusual noises or compressor clutch failure
  • Refrigerant leaks or pressure inconsistencies
  • HVAC system cycling on and off frequently
  • Complete compressor failure resulting in no A/C operation

Installation Notes and Tips

  • Verify vehicle compatibility with Buick Montana, Chevrolet Uplander, Pontiac Relay, Terraza, or Saturn before installation
  • Ensure the refrigerant system is properly evacuated and recharged following compressor replacement
  • Inspect and replace the receiver/drier or accumulator as needed to prevent contamination
  • Check the condition of the serpentine belt and A/C clutch components during installation
  • Follow manufacturer torque specifications and electrical connections carefully

Quality Assurance and Warranty Information

The Universal Air UAC MSC130CG1 Compressor Assembly (CO21578AC) is manufactured to meet industry standards for durability and performance. While specific warranty details may vary, Universal Air products typically include coverage against defects in materials and workmanship. It is recommended to consult the product documentation or supplier for exact warranty terms related to this compressor assembly.

This part fits 11 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2006BuickTerraza3.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2006ChevroletUplanderBase3.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2006ChevroletUplanderLS3.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2006ChevroletUplanderLT3.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2006PontiacMontana3.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2006SaturnRelay23.5LV6N/ACompatible with rear A/C.; UAC MSC130CG1 Compressor Assembly
2006SaturnRelay33.5LV6N/ACompatible with rear A/C.; UAC MSC130CG1 Compressor Assembly
2005BuickTerrazaN/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2005ChevroletUplanderN/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2005PontiacMontanaSV63.5LV6N/Awith Rear A/C; 1st Design; UAC MSC130CG1 Compressor Assembly
2005SaturnRelayN/ACompatible with rear A/C.; UAC MSC130CG1 Compressor Assembly

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.