🔧 Impala - Battery Replacement

Replacing the battery on your Impala is a straightforward job: you’ll disconnect the old battery, remove the hold-down, swap in the new one, and reconnect everything in the correct order. Doing it right prevents electrical damage and helps avoid no-start or charging issues.

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

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⚠️ Safety & Precautions

• ⚠️ Turn the key off and remove it before starting.
• ⚠️ Wear eye protection and gloves—battery acid is corrosive.
• ⚠️ Disconnect the negative (-) cable first and reconnect it last to reduce the risk of a short.
• ⚠️ Don’t let a metal tool touch the battery terminal and body metal at the same time.
• ⚠️ Keep flames/sparks away—batteries can vent hydrogen gas.
• ⚠️ Battery disconnect is not strictly required, but you will be disconnecting both battery cables during this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• 13mm socket
• 3/8" drive ratchet
• 3" extension (3/8" drive)
• Torque wrench (3/8" drive, 5-30 ft-lbs range)
• Battery terminal puller (specialty)
• Battery terminal brush
• Baking soda
• Clean water (spray bottle)
• Shop towels
• 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 Impala) - Qty: 1
• Battery terminal anti-corrosion washers - Qty: 2
• Battery terminal protectant spray - Qty: 1
• Battery hold-down bolt (optional, if corroded) - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and let the engine bay cool if it’s hot.
• If you want to keep radio presets, use a 12V memory saver (plugs into the OBD-II port). Optional, but nice to have.
• Locate the battery and identify the terminals: negative (-) usually has a black cable; positive (+) usually has a red cover/cable.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the battery

• Open the hood and locate the battery in the engine compartment.
• If there’s a battery cover/insulator, remove it by hand (or use a 10mm socket if it’s bolted on).

Step 2: Disconnect the negative (-) cable first

• Use an 8mm socket (some clamps use 10mm socket) to loosen the negative terminal clamp bolt.
• Twist the clamp gently and lift it straight up off the battery post.
• Tuck the cable to the side so it can’t spring back and touch the terminal.
• Negative off first prevents accidental shorting.

Step 3: Disconnect the positive (+) cable

• Flip up/remove the red protective cover (if equipped).
• Use an 8mm socket (or 10mm socket) to loosen the positive terminal clamp bolt.
• Lift the clamp straight up and move it aside so it can’t touch the battery.

Step 4: Remove the battery hold-down

• Look for the battery hold-down bracket at the base of the battery.
• Use a 13mm socket, 3/8" drive ratchet, and 3" extension to remove the hold-down bolt.
• Remove the hold-down bracket and set it aside.

Step 5: Lift out the old battery

• Carefully lift the battery straight up and out (it’s heavy).
• Set it on the ground in an upright position.

Step 6: Clean corrosion (if present)

• If you see white/green crust, sprinkle a little baking soda on it.
• Lightly spray clean water (spray bottle) to neutralize it, then wipe with shop towels.
• Use a battery terminal brush to clean the inside of the cable clamps until shiny.
• Clean metal-to-metal contact prevents starting issues.

Step 7: Install the new battery

• Place the new battery into the tray in the same orientation as the old one.
• Reinstall the hold-down bracket and start the bolt by hand.
• Tighten the hold-down bolt using a 13mm socket and torque wrench: Torque to 20 Nm (15 ft-lbs).

Step 8: Reconnect cables (positive first, negative last)

• Install anti-corrosion washers (optional) on the battery posts.
• Push the positive (+) clamp fully down on the post, then tighten using an 8mm socket: Torque to 15 Nm (11 ft-lbs).
• Push the negative (-) clamp fully down on the post, then tighten using an 8mm socket: Torque to 15 Nm (11 ft-lbs).
• Apply a light coat of battery terminal protectant spray to help prevent future corrosion.

Step 9: Reinstall any covers

• Reinstall the battery cover/insulator by hand or using a 10mm socket if required.
• Double-check that the cables are tight and not able to rotate by hand.

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✅ After Repair

• Start the engine and confirm it cranks normally.
• Check that the battery warning light on the dash is off after starting.
• Test headlights, power windows, and radio.
• Reset the clock and radio presets if they were lost.
• Take the old battery to an auto parts store for recycling (core return).

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💰 DIY vs Shop Cost

Shop Cost: $220-$380 (parts + labor)

DIY Cost: $140-$260 (parts only)

You Save: $80-$160 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?

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.