HomeHVAC > Hoses and PipesFour Seasons 66056 A/C Refrigerant Suction Hose
Part #: 66056

Four Seasons 66056 A/C Refrigerant Suction Hose

Hose Assembly
11 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$63.97Free 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
Hose Assembly
Fitment: Buick and Cadillac, Lucerne and DTS
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Hose Assembly 66056

The Four Seasons Hose Assembly 66056 is designed specifically for the HVAC system of Buick and Cadillac vehicles, including the DTS and Lucerne models. This A/C refrigerant suction hose ensures reliable low-pressure refrigerant flow with durable aluminum and rubber construction.

  • Material: Aluminum and rubber for durability and flexibility
  • End 1 Type: P-nut fitting for secure connection
  • End 2 Type: Captured o-ring to prevent leaks
  • Refrigerant Type: Compatible with R134a refrigerant
  • Includes gasket and fittings for complete installation
  • Equipped with muffler to reduce noise
  • OE replacement part ensuring proper fit and function
  • Designed without a service port or switch for specific system compatibility

Four Seasons Hose Assembly Product Line Details

The Four Seasons Hose Assembly product line focuses on delivering reliable hose assemblies tailored for HVAC systems. This line emphasizes quality materials and precise fitment, making the 66056 suction hose a direct OE replacement for Buick DTS and Cadillac Lucerne models. The assemblies are engineered to maintain system integrity and performance under low-pressure conditions.

Detailed Product Description

The Four Seasons 66056 A/C refrigerant suction hose is constructed from a combination of aluminum and rubber, providing both strength and flexibility needed for effective refrigerant flow. The hose features a P-nut fitting on the suction end and a captured o-ring on the opposite end to ensure a secure, leak-free connection. Designed for use with R134a refrigerant, this hose assembly includes all necessary fittings and a gasket for a complete installation. The integrated muffler helps minimize operational noise, enhancing overall system comfort. This hose assembly is intended for low-pressure sections of the HVAC system and does not include a service port or switch, aligning with the original equipment specifications for Buick DTS and Cadillac Lucerne vehicles.

Common Applications and Issues Addressed

  • Replacement of worn or damaged A/C refrigerant suction hoses
  • Elimination of refrigerant leaks caused by degraded seals or fittings
  • Restoration of proper refrigerant flow in low-pressure HVAC lines
  • Reduction of noise from refrigerant flow with built-in muffler
  • Ensuring compatibility with R134a refrigerant systems in Buick and Cadillac models

Installation Notes and Tips

  • Verify compatibility with Buick DTS and Cadillac Lucerne before installation
  • Ensure all fittings and gasket are properly seated to prevent leaks
  • Use appropriate tools to tighten P-nut fittings without over-torquing
  • Inspect the HVAC system for other worn components during replacement
  • Follow vehicle manufacturer guidelines for refrigerant handling and safety

Quality Assurance and Warranty

The Four Seasons Hose Assembly 66056 is an OE replacement part manufactured to meet original equipment specifications. It includes all necessary fittings and seals to ensure a proper fit and function. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Always consult product documentation or the manufacturer for exact warranty terms.

BrandFour Seasons
Part Number66056
PositionHose Assembly
Bracket?w/o Bracket
Component TypeSuction Line
DescriptionHose Assemblies
End 1 TypeP-Nut Fitting
End 2 TypeCaptured O-Ring
Fittings IncludedIncluded
Friction Material Attachmentw/o Switch Port
Gasket Or Seal IncludedIncluded
MaterialAluminum / Rubber
Muffler?w/ Muffler
O.E. Replacement?Yes
Refrigerant TypeR134a
Service Port?w/o Service Port
Suction End TypeP-Nut Fitting
Switch Included?Not Included
System PressureLow Pressure

This part fits 11 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011BuickLucerne4.6LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2011CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2010BuickLucerne4.6LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2010CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2009CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2008BuickLucerne4.6LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2008CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2007BuickLucerne4.6LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2007CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2006BuickLucerne4.6LV8N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2006CadillacDTSN/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose 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:

15265337153350515777127158484482576061725994170282455481307966056704560785623A82496HA111229CT66056

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