🔧 Traverse - A/C Compressor Replacement

Replacing the A/C compressor on your Traverse involves safely recovering the refrigerant, removing the drive belt and compressor, transferring the correct oil amount, then evacuating and recharging the system to the underhood label spec. The “why” matters here: opening the A/C system to air/moisture can ruin the new compressor if evacuation and oil charge aren’t correct.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

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⚠️ Safety & Precautions

• ⚠️ Refrigerant must be recovered with approved equipment; do not vent to atmosphere.
• ⚠️ Wear eye protection and gloves; liquid refrigerant can cause frostbite.
• ⚠️ Keep dirt out of open A/C lines; cap/plug lines immediately.
• ⚠️ If your Traverse uses R-1234yf, use only R-1234yf-rated service tools and oil.
• ⚠️ Disconnect the negative battery cable before unplugging the compressor electrical connector.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 3/8" drive ratchet
• 1/2" drive ratchet
• Torque wrench (10-100 Nm range)
• Serpentine belt tool (specialty)
• Socket set (8mm, 10mm, 13mm, 15mm)
• Extension set (3", 6")
• Trim clip removal tool
• Flat blade screwdriver
• A/C line caps/plugs kit (specialty)
• A/C manifold gauge set for your refrigerant (specialty)
• Vacuum pump (specialty)
• Refrigerant recovery machine (specialty)
• Refrigerant scale (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• A/C compressor (new) - Qty: 1
• A/C compressor manifold seal O-ring set - Qty: 1
• Correct A/C compressor oil (per underhood label/spec) - Qty: 1
• Refrigerant (per underhood label: R-1234yf or R-134a) - Qty: 1 charge
• Serpentine belt - Qty: 1 Optional if cracked/glazed
• A/C receiver/drier or desiccant element (as specified for your system) - Qty: 1 Recommended if system was open

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Have the A/C refrigerant professionally recovered first if you don’t have recovery equipment.
• Open the hood and confirm the underhood A/C label for refrigerant type and charge amount.
• Disconnect the negative battery cable using a 10mm socket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Recover the refrigerant (required)

• Connect your A/C manifold gauge set for your refrigerant (specialty) to the high/low service ports.
• Use the refrigerant recovery machine (specialty) to recover the refrigerant completely.
• Once recovered, close the valves and disconnect the equipment.

Step 2: Raise and support the front of the Traverse

• Lift with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove any lower splash shield panels as needed using an 8mm socket and trim clip removal tool.

Step 3: Remove the serpentine belt from the A/C compressor

• Relieve tension using a serpentine belt tool (specialty) on the belt tensioner.
• Slip the belt off the A/C compressor pulley and slowly release the tensioner.
• Tip: Take a quick belt-routing photo first.

Step 4: Disconnect the compressor electrical connector

• Unplug the compressor connector by releasing the lock tab using a flat blade screwdriver (gentle pressure).

Step 5: Disconnect the A/C line manifold from the compressor

• Clean the area around the manifold connection with a dry rag to keep debris out.
• Remove the manifold retaining bolt using a 10mm socket.
• Carefully pull the manifold straight off the compressor.
• Immediately cap the open lines using an A/C line caps/plugs kit (specialty).
• Remove and discard the old O-rings.
• When reinstalling later: Torque the manifold bolt to 10 Nm (89 in-lb).

Step 6: Remove the A/C compressor

• Support the compressor with one hand.
• Remove the compressor mounting bolts using a 13mm socket and extension set (3", 6").
• Lower and remove the compressor from the bottom area.
• When reinstalling later: Torque the compressor mounting bolts to 25 Nm (18 ft-lb).

Step 7: Prepare the new compressor (oil balancing)

• Drain the oil from the old compressor into a clean measuring container (rotate the hub by hand to help it drain).
• Drain the shipping oil from the new compressor (many come pre-filled with shipping oil).
• Add the same amount of the correct oil back into the new compressor using the correct A/C compressor oil (per underhood label/spec).
• This “oil balancing” matters because too much or too little oil can reduce cooling and damage the compressor.

Step 8: Install the new compressor

• Position the compressor and start bolts by hand to avoid cross-threading.
• Tighten mounting bolts using a 13mm socket, then torque wrench (10-100 Nm range): Torque to 25 Nm (18 ft-lb).
• Reconnect the electrical connector until it clicks.

Step 9: Reinstall A/C line manifold with new seals

• Lightly lubricate new O-rings with a small amount of the correct compressor oil.
• Install the new O-rings onto the manifold.
• Remove caps/plugs and install the manifold straight onto the compressor.
• Install the retaining bolt with a 10mm socket, then use a torque wrench (10-100 Nm range): Torque to 10 Nm (89 in-lb).

Step 10: Reinstall the serpentine belt

• Route the belt correctly and use the serpentine belt tool (specialty) to relieve the tensioner.
• Confirm the belt is fully seated in every pulley groove before starting the engine.

Step 11: Evacuate and recharge the A/C system

• Connect the A/C manifold gauge set for your refrigerant (specialty) and vacuum pump (specialty).
• Pull vacuum and hold to verify no leaks (a stable vacuum indicates no major leaks).
• Recharge using a refrigerant scale (specialty) with the exact amount listed on the underhood label.
• If your system was open for a while, replacing the receiver/drier or desiccant element is strongly recommended (where serviceable).

Step 12: Reinstall splash shields and lower the vehicle

• Reinstall panels using an 8mm socket and trim clip removal tool.
• Lower the Traverse off the jack stands (rated 3-ton minimum) using the floor jack (rated 3-ton minimum).

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✅ After Repair

• Reconnect the negative battery cable using a 10mm socket.
• Start the engine and turn A/C on MAX; verify cold air and that the compressor engages.
• Check for leaks at the manifold connection (visual check; oily residue can indicate a leak).
• Verify vent temperature improves and no unusual compressor noise is present.

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💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,200 (parts + labor)

DIY Cost: $450-$1,100 (parts only)

You Save: $750-$1,100 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

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Quick check so I guide you correctly (reply with 2 answers):

• ❓ What refrigerant does your underhood label show: R-1234yf or R-134a?
• ❓ Is the compressor being replaced due to noise/seized, or no cooling/leak?