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# New Genuine Four Seasons Complete A/C Compressor Kit with Clutch
### Part Number: 3921NK | Premium Front A/C Installer Kit for GM Trucks & SUVs (V8)
Restore freezing cold air conditioning to your truck or SUV with this brand-new, premium Four Seasons Complete A/C Installer Kit. To satisfy manufacturing warranty terms and prevent a repeat failure, swapping an A/C compressor requires changing out the internal line filter and metering devices. This all-in-one package eliminates the hassle of tracking down individual parts by grouping the compressor and every necessary service component in a single convenient box!
Every component included in this kit is precision-engineered to meet or exceed original equipment specifications, ensuring quiet operation, strict leak protection, and factory-grade cooling.
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## 🚘 Vehicle Compatibility Chart
This premium direct-fit front A/C kit is designed for the following V8-equipped models:
* **Cadillac Escalade / ESV / EXT** — 2002, 2003, 2004, 2005
* **Chevrolet Avalanche 1500 / 2500** — 2002, 2003, 2004, 2005, 2006
* **Chevrolet Silverado 1500 / 2500 / 3500** — 2000, 2001, 2002, 2003, 2004, 2005, 2006
* **Chevrolet Suburban 1500 / 2500** — 2000, 2001, 2002, 2003, 2004, 2005, 2006
* **Chevrolet Tahoe** — 2000, 2001, 2002, 2003, 2004, 2005, 2006
* **GMC Sierra 1500 / 2500 / 3500** — 2000, 2001, 2002, 2003, 2004, 2005, 2006
* **GMC Yukon / Yukon XL 1500 / 2500** — 2000, 2001, 2002, 2003, 2004, 2005, 2006
* **Hummer H2** — 2003, 2004, 2005, 2006, 2007
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## 📦 What is Included in this Complete Kit?
1. **New A/C Compressor (78377):** 10S17F style aluminum body pre-assembled with a 12V clutch and 4-groove serpentine pulley.
2. **A/C Accumulator / Receiver Drier (83208):** Features a 3.50" diameter and 8" overall length with specialized P-Nut style line connections to screen out harmful system moisture.
3. **Orifice Tube (38638):** Standard-style black metering device with a precise 0.072-inch diameter orifice hole.
4. **Compressor Oil (59007):** Pre-measured high-grade PAG 46 lubricant formulated specifically for R134a setups.
5. **Gasket & O-Ring Seal Kit:** Strict OE-grade green rubber compressor-to-line seals for an air-tight fit.
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## ✨ Key Features & Benefits
* **All-In-One Box Solution:** Combines the brand-new compressor with the accumulator filter, expansion tube, oil, and seals to satisfy standard warranty terms instantly.
* **Premium OE Build Quality:** Engineered with a rigid, lightweight aluminum housing and high-grade thrust bearings to drastically drop cabin vibrations and noise.
* **100% Tested Leak Protection:** Every core part is individually pressure-tested and vacuum-tested to ensure zero refrigerant loss and dependable summer performance.
* **Direct Bolt-On Setup:** Built strictly to vehicle-specific dimensions to match factory engine brackets, manifold connections, and electrical plugs perfectly.
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## 🔄 Part Number Cross-Reference Guide
* **Four Seasons Part Number:** 3921NK / FSS-3921NK
* **Interchange Numbers:** 520543, MK1001, 2021876, 14-3921NK
* **UPC Barcode:** 096361075450
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## 📋 Technical Specs
* **Compressor Base Style:** 10S17F / 10S20F Fitment Design
* **Pulley Configuration:** 4-Groove Serpentine Drive System
* **Refrigerant Type:** R134a System Only
* **Orifice Tube Profile:** Black / 0.072-Inch Diameter
* **Condition:** Brand New in Box (Never Remanufactured / No Core Charge Required)
