🔧 Impala - Battery Replacement

On your Impala, the 12V battery is mounted in the trunk area. You’ll remove the trunk-side access cover, disconnect the cables (negative first), swap the battery, then reconnect (positive first) to restore power safely.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Turn ignition OFF, remove key/fob from the car, and keep it at least 10+ feet away so modules go to sleep.
• ⚠️ Wear gloves and safety glasses—battery acid is corrosive and batteries are heavy.
• ⚠️ Disconnect the negative (-) cable first and reconnect it last to reduce short-circuit risk.
• ⚠️ Do not let a tool touch the battery positive and any metal body part at the same time.
• ⚠️ If your Impala has a sensor on the negative cable, don’t pry or twist on it.
• ⚠️ Battery disconnect is required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 3/8" ratchet
• 3" extension (3/8")
• Torque wrench (inch-pound, 0-200 in-lb)
• Torque wrench (foot-pound, 10-80 ft-lb)
• Trim clip removal tool
• Battery terminal brush
• Work light
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 12V battery (correct fitment for your Impala) - Qty: 1
• Battery terminal anti-corrosion washers - Qty: 2
• Battery terminal protectant spray - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and set the parking brake.
• 🔑 Make sure everything is off (lights, HVAC, radio). Close doors if possible so interior lights don’t stay on.
• 🧠 Expect memory resets: clock/time, trip data, and some settings may reset after battery replacement.
• 🧰 A trim clip removal tool is a plastic pry tool used to pop interior push-clips without breaking them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the battery in the trunk

• Open the trunk and remove the floor panel using your hands.
• Use a work light so you can clearly see the right-side trunk panel area.
• Remove the battery access cover/panel on the trunk side using a trim clip removal tool (pop the push-clips straight out).

Step 2: Disconnect the negative (-) battery cable

• Use a 10mm socket with a 3/8" ratchet and 3" extension to loosen the negative terminal bolt.
• Lift the negative cable off the battery and position it so it cannot spring back onto the terminal. Wrap with a glove if needed.

Step 3: Disconnect the positive (+) battery cable

• Use a 10mm socket with a 3/8" ratchet to loosen the positive terminal bolt.
• Lift the positive cable off and move it safely aside.

Step 4: Remove the battery hold-down

• Locate the battery hold-down clamp at the base of the battery.
• Use a 13mm socket with a 3/8" ratchet and 3" extension to remove the hold-down bolt and clamp.
• Set the clamp and bolt aside where they won’t get lost.

Step 5: Remove the old battery

• Put on nitrile gloves and safety glasses.
• Lift the battery straight up and out (it’s heavy—use your legs, not your back).

Step 6: Clean the terminals and prep the new battery

• Use a battery terminal brush to clean any corrosion from the cable ends.
• Install battery terminal anti-corrosion washers onto the battery posts.
• Verify the new battery orientation matches the old one so cables reach without stretching.

Step 7: Install the new battery and secure it

• Set the new battery into the tray in the same position as the old one.
• Reinstall the hold-down clamp and bolt using a 13mm socket and 3/8" ratchet.
• Tighten with a torque wrench (foot-pound, 10-80 ft-lb): Torque to 15 ft-lbs (20 N·m).

Step 8: Reconnect the positive (+) cable first

• Install the positive cable onto the terminal.
• Tighten using a 10mm socket, then finalize with a torque wrench (inch-pound, 0-200 in-lb): Torque to 115 in-lbs (13 N·m).
• Apply battery terminal protectant spray to reduce future corrosion.

Step 9: Reconnect the negative (-) cable last

• Install the negative cable onto the terminal.
• Tighten using a 10mm socket, then finalize with a torque wrench (inch-pound, 0-200 in-lb): Torque to 115 in-lbs (13 N·m).
• Apply battery terminal protectant spray.

Step 10: Reinstall trunk panels

• Reinstall the battery access cover/panel and push-clips using your hands (use the trim clip removal tool only if you need help aligning clips).
• Reinstall the trunk floor panel.

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✅ After Repair

• ✅ Start your Impala and confirm it cranks normally and the charging system light is off.
• ✅ Reset the clock and re-save radio presets as needed.
• ✅ If you see warning messages that don’t clear after a short drive, shut the car off for 2 minutes, restart, and recheck.
• ✅ Make sure the trunk light turns off and the trunk trim is fully clipped back in.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $180-$320 (parts only)

You Save: $70-$130 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

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