Complete replacement of the electric AC compressor on the 2023 Chevrolet Bolt EUV, including refrigerant recovery, component removal, installation, and system recharge.

Warnings

Tools required

Parts

• AC Compressor assembly (electric) × 1 — Use OEM specification for electric vehicle
• AC line O-rings × 4 — Use OEM specification
• PAG oil for electric compressor × 1 — Check compressor specification
• R-1234yf refrigerant × 1 — As required by system capacity

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off vehicle and remove key fob from passenger compartment
3. Disable high voltage system: Remove 12V auxiliary battery negative terminal, wait 5 minutes for capacitor discharge
4. Verify high voltage system is de-energized using high voltage multimeter at service disconnect
5. Remove high voltage service disconnect located under rear seat
6. Install high voltage lockout/tagout device and maintain key control
7. Raise vehicle on lift or secure on jack stands at manufacturer-specified lift points
8. Remove driver side front wheel for improved access to compressor
9. Remove plastic underbody panel and front fender liner (driver side)

Procedure

1. 1

   Recover refrigerant from AC system
   Connect AC recovery machine to service ports. Follow machine instructions to completely recover all R-1234yf refrigerant from the system. Record the amount recovered for reference during recharge. Allow system to fully evacuate and verify recovery is complete.
2. 2

   Disconnect high voltage connector from compressor
   While wearing high voltage insulated gloves, locate the orange high voltage connector on the AC compressor. Press the locking tab and carefully disconnect the high voltage power cable from the compressor. Secure connector away from work area and cover with insulating material.
3. 3

   Disconnect AC refrigerant lines
   Using flare nut wrenches, carefully disconnect the suction and discharge line fittings from the AC compressor. Immediately cap all open refrigerant ports to prevent moisture and contamination entry. Inspect and discard old O-rings from the fittings.
4. 4

   Remove compressor mounting bolts
   Support the compressor weight with one hand. Remove the three compressor mounting bolts securing the unit to the mounting bracket. Carefully lower the compressor and extract it from the engine compartment through the wheel well opening.
5. 5

   Drain and measure compressor oil
   Drain the PAG oil from the old compressor into a clean graduated container. Measure the quantity drained. This measurement will determine how much oil to add to the new compressor. If contamination is present, consider flushing the AC system before installing new compressor.
6. 6

   Prepare new compressor
   Remove shipping caps from new compressor ports. Add the appropriate amount of PAG oil (same as drained, or per compressor instructions if significantly different). Rotate compressor shaft by hand 10-15 revolutions to distribute oil internally. Verify compressor rotates freely without binding.
7. 7

   Install new compressor
   Position the new AC compressor into the mounting bracket, aligning the mounting holes. Install the three compressor mounting bolts hand-tight first, then torque in a star pattern to specification to ensure even clamping force.
8. 8

   Install new O-rings and connect refrigerant lines
   Install new O-rings onto both the suction and discharge line fittings. Lightly coat O-rings with clean PAG oil for proper sealing. Connect both refrigerant lines to the compressor and torque the fittings to specification using flare nut wrenches.
   Torque spec

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

   Reconnect high voltage connector
   While wearing high voltage insulated gloves, reconnect the orange high voltage power cable to the AC compressor. Ensure the connector seats fully and the locking tab engages with an audible click. Verify connection is secure by gently pulling on the connector.
10. 10

    Evacuate AC system
    Connect AC evacuation equipment to service ports. Evacuate the system to at least 29 inches of mercury vacuum for a minimum of 30 minutes. Monitor for vacuum decay to verify system integrity. System should hold vacuum without significant loss indicating no leaks.
11. 11

    Recharge AC system
    Using AC recharge equipment, add R-1234yf refrigerant to system per manufacturer specifications (typically 1.3-1.5 lbs for Bolt EUV). Add refrigerant as a liquid into the low-side port. Verify correct charge by weight, not pressure. Disconnect recharge equipment.
12. 12

    Reinstall underbody components and wheel
    Reinstall the driver side front fender liner and plastic underbody panel with all fasteners. Reinstall the driver side front wheel and torque lug nuts to specification per vehicle manual. Lower vehicle to ground.
13. 13

    Re-enable high voltage system
    Remove lockout/tagout device from high voltage service disconnect. Reinstall high voltage service disconnect under rear seat. Reconnect 12V auxiliary battery negative terminal. Verify all high voltage safety interlocks are properly engaged.

Reassembly

1. Ensure all high voltage connections are properly secured with locking mechanisms engaged
2. Verify all AC line fittings are torqued to specification and O-rings are properly seated
3. Confirm no tools or materials are left in engine compartment
4. Double-check that high voltage service disconnect is fully installed and rear seat is properly secured

Verification

• Start vehicle and allow high voltage system to initialize fully without errors
• Activate AC system and verify compressor engages (listen for operation and check power draw)
• Verify cold air output from cabin vents within 2-3 minutes of AC activation
• Check for abnormal noises from compressor during operation
• Inspect all refrigerant line connections for signs of oil residue indicating leaks
• Use electronic leak detector around all AC connections to verify no refrigerant leaks
• Monitor AC system performance over 10-15 minute test drive to ensure consistent cooling
• Verify no high voltage system warning lights or messages on instrument cluster
• Scan vehicle with diagnostic tool to confirm no AC or high voltage system fault codes present

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