🔧 Grand Caravan - Rear Window Regulator Replacement

The rear window regulator is the mechanism that moves the rear door glass up and down. Replacement is needed if the window won’t move, moves crooked, or you hear the motor running but the glass doesn’t move.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours (per rear door)

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⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery cable before door work to reduce airbag risk.
• ⚠️ Rear doors may contain side-impact airbag components; do not probe yellow connectors or wiring.
• ⚠️ Support the window glass at all times; falling glass can cut you.
• ⚠️ Wear gloves and safety glasses; the door shell has sharp edges.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" ratchet
• 6" extension for 1/4" ratchet
• Phillips screwdriver
• Flat trim removal tool
• Pick tool
• Torx T20 bit
• Torx T30 bit
• Needle-nose pliers
• Painters tape (1.5" wide)
• Utility knife
• Rivet gun (specialty)
• Drill
• 1/4" drill bit
• Torque wrench (inch-pound)
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear window regulator assembly - Left or Right (match the door) - Qty: 1
• Rear window regulator motor - Qty: 1 (only if not included with regulator)
• Door panel retainer clips - Qty: 6-10 (as needed)
• Vapor barrier butyl tape - Qty: 1
• Regulator rivets or mounting hardware kit - Qty: 1

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📋 Before You Begin

• 🧰 Park on level ground and turn the ignition OFF.
• 🧰 Lower the rear window to about halfway if it still moves (this gives access to the glass clamps).
• 🧰 Disconnect the battery negative cable using a 10mm socket.
• 🧰 Take a photo of connectors before unplugging.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the rear door trim panel

• Use a pick tool to lift the small plastic covers hiding the screws.
• Remove the door-handle/armrest screws using a Phillips screwdriver and/or Torx T20 bit (fastener type can vary by build).
• Use a flat trim removal tool (a plastic pry tool that pops clips without breaking them) to pop the panel clips around the edges.
• Lift the panel straight up and off the window ledge.
• Unplug the window switch and courtesy light connectors using a pick tool to release the lock tabs.

Step 2: Remove the vapor barrier (water shield)

• Carefully peel the plastic vapor barrier back using your hands and a utility knife only to cut sticky butyl if needed.
• Do not rip it—this barrier keeps water off the electronics inside the van.

Step 3: Secure the window glass

• Run several strips of painters tape (1.5" wide) from the outside of the glass up over the door frame to hold the glass.
• If the regulator is broken and the glass is loose, hold the glass by hand while adding tape.
• Add more tape than you think you need.

Step 4: Disconnect the regulator from the glass

• Reconnect the window switch temporarily, reconnect the battery negative with a 10mm socket, and turn ignition ON just long enough to position the glass clamp bolts in the access holes (skip this if the window won’t move).
• Turn ignition OFF and disconnect the battery negative again using the 10mm socket.
• Loosen the glass clamp fasteners using a 10mm socket (some regulators use a different head; use what fits).
• Lift the glass fully up by hand and re-tape it securely.

Step 5: Unplug and remove the regulator/motor assembly

• Unplug the regulator motor connector (do not pull on wires) using a pick tool to release the lock.
• If the regulator is riveted in (common), drill out the rivet heads using a drill and 1/4" drill bit.
• If the regulator is bolted in, remove the mounting bolts using a 10mm socket.
• Remove the regulator through the door access opening.

Step 6: Install the new regulator

• Slide the new regulator into the door and align it to the mounting holes.
• If using rivets, install them with a rivet gun (specialty).
• If using bolts, tighten with a 10mm socket and torque wrench (inch-pound): Torque to 9 Nm (80 in-lbs).
• Plug in the regulator motor connector until it clicks.

Step 7: Reattach the glass to the regulator

• Carefully lower the glass into the regulator clamps (keep one hand on the glass).
• Tighten the glass clamp fasteners using a 10mm socket and torque wrench (inch-pound): Torque to 10 Nm (89 in-lbs).
• Remove the painters tape.

Step 8: Function test before reassembly

• Reconnect the battery negative using the 10mm socket.
• Turn ignition ON and test the rear window up/down with the switch.
• Listen for binding and watch that the glass stays straight in the run channels.
• Turn ignition OFF and disconnect the battery negative again using the 10mm socket before reinstalling the vapor barrier and panel.

Step 9: Reinstall the vapor barrier and door panel

• Press the vapor barrier back onto the butyl; add vapor barrier butyl tape where it no longer sticks.
• Reconnect all door panel electrical connectors.
• Hang the door panel on the top lip first, then press clips in by hand around the edges.
• Reinstall screws using a Phillips screwdriver and/or Torx T20 bit and snug them evenly.
• Reconnect the battery negative using the 10mm socket.

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✅ After Repair

• 🧪 Verify the window goes fully up and seals evenly at the top.
• 🧪 Confirm the window works from both the rear door switch and the driver master switch.
• 🧪 Check that the door panel is fully clipped and doesn’t rattle.
• 🧪 If the window reverses or acts “confused,” cycle it fully down and fully up a few times to help it relearn its stops.

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💰 DIY vs Shop Cost

Shop Cost: $350-$700 (parts + labor, per rear door)

DIY Cost: $90-$220 (parts only, per rear door)

You Save: $260-$480 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 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.