AC Receiver/Drier

This procedure covers the removal and replacement of the AC receiver/drier on a 2014-2018 Chevrolet Silverado 1500 with the 5.3L V8 engine, including refrigerant recovery, component replacement, and system recharge.

Warnings

Tools required

Parts

• AC Receiver/Drier × 1 — ACDelco 15-50082 or equivalent
• AC O-ring kit × 1 — Use OEM specification
• PAG 46 oil × 1 — 2-4 oz depending on system loss

Fluids

• R-134a refrigerant

Preparation

1. Ensure engine is off and cool
2. Park vehicle on level ground and engage parking brake
3. Verify AC system contains R-134a refrigerant using identifier
4. Have new receiver/drier ready but keep sealed until installation
5. Prepare AC recovery machine and verify it is properly maintained

Procedure

1. 1

   Recover refrigerant from AC system
   Connect AC recovery machine to service ports (low side on accumulator line, high side near compressor). Follow machine manufacturer instructions to fully recover all refrigerant from the system. Record amount recovered for comparison during recharge. Allow system to equalize to atmospheric pressure before disconnecting recovery equipment.
2. 2

   Locate and access receiver/drier
   The receiver/drier is mounted on the passenger side of the engine bay, attached to the condenser or nearby on the frame. It is a vertical cylindrical component with inlet and outlet lines. No removal of major components is typically required for access on this model.
3. 3

   Disconnect AC lines from receiver/drier
   Using appropriate wrenches, disconnect the inlet line from the condenser and the outlet line going to the evaporator from the receiver/drier. Support lines to prevent stress on other connections. Immediately cap all open fittings to prevent moisture and contamination entry. Inspect and discard old O-rings.
4. 4

   Remove receiver/drier mounting
   Remove the mounting bracket bolts securing the receiver/drier to its mounting location. The receiver/drier may be held by a clamp-style bracket or bolt-through bracket. Carefully remove the old receiver/drier and keep upright to prevent oil spillage.
   Torque spec

   Receiver Drier Bolts10 Nm (7 lb-ft)
5. 5

   Measure and prepare oil
   Drain oil from old receiver/drier into a clean graduated container and measure the amount. Add the same amount of fresh PAG 46 oil to the new receiver/drier, plus an additional 1 oz to compensate for system losses. If more than 4 oz came out, inspect system for oil migration issues.
6. 6

   Install new O-rings
   Remove caps from new receiver/drier ports. Install new O-rings on both AC line fittings, ensuring proper size and fit. Lightly coat O-rings with fresh PAG oil for lubrication and proper sealing. Do not reuse old O-rings.
7. 7

   Install new receiver/drier
   Remove new receiver/drier from packaging and quickly position it in the mounting bracket with ports oriented correctly for line connections. Work quickly to minimize atmospheric exposure (complete within 15 minutes of opening). Install mounting bracket bolts and torque to specification.
   Torque spec

   Receiver Drier Bolts10 Nm (7 lb-ft)
8. 8

   Connect AC lines to receiver/drier
   Remove caps from AC lines and receiver/drier ports. Connect inlet line from condenser to receiver/drier inlet port. Connect outlet line to evaporator to receiver/drier outlet port. Hand-tighten fittings first to ensure proper thread engagement, then torque to specification using backup wrench on receiver/drier ports to prevent twisting.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
9. 9

   Evacuate AC system
   Connect vacuum pump to AC service ports. Evacuate system to at least 29 inches of mercury vacuum for minimum 30 minutes (45 minutes recommended for this system capacity). Close service valves and observe vacuum hold for 10 minutes. Vacuum should not drop more than 2 inches, indicating no leaks.
10. 10

    Recharge AC system
    Using AC recovery/recharge machine, recharge system with R-134a refrigerant to specification (typically 2.0-2.2 lbs for this system, verify on underhood label). Charge through low-side port with engine running and AC on MAX/recirculate. Monitor pressures and stop when correct amount is added.
11. 11

    Check for leaks
    With system pressurized and running, use electronic leak detector or soap solution to check all connections at the receiver/drier inlet and outlet fittings. Check surrounding connections disturbed during service. No leaks should be present.

Reassembly

1. Ensure all AC line fittings are properly torqued and leak-free
2. Verify receiver/drier mounting bracket is secure
3. Check that no tools or materials were left in engine bay
4. Close hood and prepare for system verification

Verification

• Start engine and turn AC to MAX cold with high blower speed
• Allow system to run for 5-10 minutes and verify cold air output (vent temperature should be 38-42°F)
• Monitor AC pressures: low side should be 25-45 PSI, high side 200-275 PSI at idle with 80-90°F ambient temperature
• Check compressor engagement and cycling is normal
• Verify no unusual noises from AC system components
• Confirm no refrigerant odor or visible oil leaks around receiver/drier connections
• Test AC performance during road test under various conditions

Related trouble codes on this vehicle

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