Four Seasons 38654 A/C Expansion Valve - Rear

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Expansion Valve

Four Seasons 38654 A/C Expansion Valve - Rear

Brand	Four Seasons 38654
Position	Rear
Color	Brass
Refrigerant Type	R134A
Type	TXV
Product line	Expansion Valve
Fits	Chevrolet and GMC · 197 vehicles

TXV design. Precisely meters refrigerant flow for efficient A/C performance.

Brass construction. Durable material helps resist wear in HVAC service.

R134A compatible. Built for systems using R134A refrigerant.

Cross-references AMS Automotive 4638, Carlson 17418 and Champion Spark Plug 19272 for the same application. See all 51.

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Four Seasons 38654 Expansion Valve

The Four Seasons 38654 A/C expansion valve is a TXV-style HVAC flow restrictor built for R134A systems with a brass body. It is used in rear air conditioning applications on select Chevrolet and GMC vans and trucks from 1992-1996, including Chevrolet Express 1500, Express 2500, Express 3500, G10, G20, G30, P30, and GMC Savana 1500, Savana 2500, Savana 3500, G1500, G2500, G3500, and P3500.

Four Seasons Expansion Valve line parts are selected for precise refrigerant metering in automotive A/C systems, helping maintain proper evaporator performance in vehicles that rely on rear HVAC operation.

Key Features

Part number 38654 A/C expansion valve
TXV design for refrigerant flow control
Brass construction
Configured for R134A refrigerant systems
Rear HVAC application on select Chevrolet and GMC models
Direct replacement style for service and repair work

Detailed Description

This Four Seasons 38654 expansion valve meters refrigerant into the evaporator based on system demand, helping the A/C system maintain stable cooling performance. It is listed for rear-position applications on 1992-1996 Chevrolet and GMC vans and chassis-cab models, including rear A/C service on Chevrolet Express and Savana platforms as well as G-series and P-series vehicles. The brass TXV construction and R134A specification make it a practical replacement for vehicles using this refrigerant type.

This part cross-references Dorman - HELP 38654 for the same application.

What It Is Used For

Restoring rear A/C cooling performance on Chevrolet Express and GMC Savana vehicles
Correcting uneven evaporator refrigerant feed in TXV-based systems
Addressing weak cabin cooling caused by a worn or sticking expansion valve
Repairing refrigerant control issues in R134A HVAC systems
Replacing a leaking or restricted rear expansion valve on G-series and P-series applications

Installation Notes and Tips

Verify the vehicle’s refrigerant type is R134A before installation.
Confirm rear HVAC configuration and inlet thread style where noted, including 18mm threaded inlet applications on select P30 and P3500 models.
Inspect the system for contamination, leaks, and restriction before installing the new valve.
Recover refrigerant and evacuate the system according to proper A/C service procedures.
Match the replacement to the exact vehicle year, make, model, and rear-position listing.

Quality Assurance

Four Seasons is a recognized name in automotive HVAC service parts, and this expansion valve is cataloged for specific OE-style replacement applications. Confirm fitment against the vehicle listing and part number 38654 before ordering.

This part fits 197 vehicles

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

Year	Make	Model	Body Type	Liters	Cylinders	Position	Notes
1996	Chevrolet	Express 1500	—	—	—	Rear	Expansion Valve
1996	Chevrolet	Express 2500	—	—	—	Rear	Expansion Valve
1996	Chevrolet	Express 3500	—	—	—	Rear	Expansion Valve
1996	Chevrolet	G30	—	—	—	Rear	Expansion Valve
1996	Chevrolet	P30	—	—	—	Rear	w/ 18mm Threaded Inlet; Expansion Valve
1996	GMC	G3500	—	—	—	Rear	Expansion Valve
1996	GMC	P3500	—	—	—	Rear	w/ 18mm Threaded Inlet; Expansion Valve
1996	GMC	Savana 1500	—	—	—	Rear	Expansion Valve
1996	GMC	Savana 2500	—	—	—	Rear	Expansion Valve
1996	GMC	Savana 3500	—	—	—	Rear	Expansion Valve
1995	Chevrolet	G10	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1995	Chevrolet	G10	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	Chevrolet	G10	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	Chevrolet	G10	Standard Passenger Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G10	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G10	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G20	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G20	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G20	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Passenger Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Cutaway Van	6.5L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G30	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G30	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1995	Chevrolet	G30	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1995	Chevrolet	P30	—	—	—	Rear	Expansion Valve
1995	GMC	G1500	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1995	GMC	G1500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	GMC	G1500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	GMC	G1500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G1500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G2500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G2500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G2500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	GMC	G2500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1995	GMC	G2500	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G2500	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G2500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G2500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G3500	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G3500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G3500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G3500	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1995	GMC	G3500	Standard Passenger Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G3500	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G3500	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G3500	Cutaway Van	6.5L	V8	Rear	Expansion Valve
1995	GMC	G3500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G3500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G3500	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1995	GMC	G3500	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1995	GMC	G3500	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1995	GMC	G3500	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1995	GMC	G3500	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1995	GMC	P3500	—	—	—	Rear	Expansion Valve
1994	Chevrolet	G10	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1994	Chevrolet	G10	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	Chevrolet	G10	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	Chevrolet	G10	Standard Passenger Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G10	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G10	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G20	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G20	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G20	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Passenger Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Cutaway Van	6.5L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G30	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G30	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1994	Chevrolet	G30	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1994	Chevrolet	P30	—	—	—	Rear	Expansion Valve
1994	GMC	G1500	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1994	GMC	G1500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	GMC	G1500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	GMC	G1500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G1500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G2500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G2500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G2500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	GMC	G2500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1994	GMC	G2500	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G2500	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G2500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G2500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G3500	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G3500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G3500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G3500	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1994	GMC	G3500	Standard Passenger Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G3500	Standard Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G3500	Extended Cargo Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G3500	Cutaway Van	6.5L	V8	Rear	Expansion Valve
1994	GMC	G3500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G3500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G3500	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1994	GMC	G3500	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1994	GMC	G3500	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1994	GMC	G3500	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1994	GMC	G3500	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1994	GMC	P3500	—	—	—	Rear	Expansion Valve
1993	Chevrolet	G10	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G10	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1993	Chevrolet	G10	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	Chevrolet	G10	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	Chevrolet	G10	Standard Passenger Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G10	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G10	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G20	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Standard Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Extended Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G20	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G20	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Passenger Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Extended Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Cutaway Van	6.2L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Passenger Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G30	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G30	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1993	Chevrolet	G30	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1993	Chevrolet	P30	—	—	—	Rear	Expansion Valve
1993	GMC	G1500	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G1500	Standard Passenger Van	5.0L	V8	Rear	Expansion Valve
1993	GMC	G1500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	GMC	G1500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	GMC	G1500	Standard Passenger Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G1500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G1500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G2500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G2500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G2500	Standard Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	GMC	G2500	Extended Cargo Van	5.0L	V8	Rear	Expansion Valve
1993	GMC	G2500	Standard Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G2500	Extended Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G2500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G2500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G3500	Standard Passenger Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G3500	Standard Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G3500	Extended Cargo Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G3500	Cutaway Van	5.7L	V8	Rear	Expansion Valve
1993	GMC	G3500	Standard Passenger Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G3500	Standard Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G3500	Extended Cargo Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G3500	Cutaway Van	6.2L	V8	Rear	Expansion Valve
1993	GMC	G3500	Standard Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G3500	Extended Cargo Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G3500	Cutaway Van	4.3L	V6	Rear	Expansion Valve
1993	GMC	G3500	Standard Passenger Van	7.4L	V8	Rear	Expansion Valve
1993	GMC	G3500	Standard Cargo Van	7.4L	V8	Rear	Expansion Valve
1993	GMC	G3500	Extended Cargo Van	7.4L	V8	Rear	Expansion Valve
1993	GMC	G3500	Cutaway Van	7.4L	V8	Rear	Expansion Valve
1993	GMC	P3500	—	—	—	Rear	Expansion Valve
1992	Chevrolet	G10	—	—	—	N/A	Expansion Valve
1992	Chevrolet	G20	—	—	—	N/A	Expansion Valve
1992	Chevrolet	G30	—	—	—	N/A	Expansion Valve
1992	GMC	G1500	—	—	—	N/A	Expansion Valve
1992	GMC	G2500	—	—	—	N/A	Expansion Valve
1992	GMC	G3500	—	—	—	N/A	Expansion Valve
No rows match your filter.

Directly replaces or cross-references 51 part numbers

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

AMS Automotive — 4638Carlson — 17418Champion Spark Plug — 19272Dorman - HELP — 38654Febi-Bilstein — 39191FEL-PRO — 1638Global Parts Distributors LLC — 3411256Monroe Shocks & Struts — 182276OSC — 4665SKF — 16406UAC — EX7413PCUAC — EX9729C95034120205A155481155542207511208364217191230010704411704414704463758654759191938654014745121810005189901231109873110987AM37586543759191111386541113919116917106C15245959952472991A17191A77511AC3873AC3873CCWK758654CWK759191EX7413PEX9729EXV2059FE364MT5004T39191T3704414