2015–2020 Chevrolet Suburban
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $133 by doing it yourself! Shop cost: $280
Quick answer: Battery Replacement on a 2015–2020 Chevrolet Suburban is rated Easy and takes about 30–45 minutes. You'll need 4 tools for this job, and parts cost about $147. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Correct group-size battery | — | $140.00 | |
| Terminal cleaner Optional | — | $8.00 | |
| Terminal protectant | — | $7.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park on level ground, set the parking brake, and switch the ignition off. Open the hood and secure it with the prop rod. Note the power-distribution block clipped onto the positive terminal and the hold-down wedge at the battery's base.
Study the power-distribution block clipped onto the positive terminal before you touch it — this assembly feeds several circuits and its plastic clips are the part most people break. Using a flathead screwdriver, gently release each clip and ease the block upward off the terminal without yanking its wiring; let it rest aside with the wires still attached. Do not pry against the block’s housing or twist it, because a cracked block means electrical gremlins until it is replaced.
I've learned: those distribution-block clips are the most broken part on this whole job. Ease each one straight up with the screwdriver — the second you pry sideways or twist, you're shopping for a new block and chasing gremlins.
Fit a 10mm socket on the negative (black) terminal clamp and loosen it counterclockwise, then wiggle the cable end straight up off the post. Tuck the cable aside where it cannot touch metal. Note the battery current sensor riding on the negative cable — leave it attached to the cable and just move the whole cable out of the way. With the ground path broken first, the rest of the job is safe from accidental shorts.
I know that little sensor box on the negative cable is the battery current sensor — it tells the computer how the battery is charging. Leave it on the cable and move the cable as one piece; unplugging it separately just invites a warning light.
With the distribution block already freed, loosen the positive cable clamp and slide it off the positive post; keep it clear of the negative cable. Now remove the hold-down wedge at the battery’s base — unbolt it and lift it out so the battery is completely free. Grip the battery with both hands and lift it straight up out of the tray; Suburban batteries are big and heavy, so keep your back straight, your grip firm, and the battery level to avoid spilling acid.
Brush out the battery tray and check it for corrosion or standing water. Inspect the distribution block’s clips for cracks while it is off — if a clip is already broken, plan to replace the block than forcing a loose connection back together.
Lower the new battery into the tray in the same orientation as the old one and refit the hold-down wedge at its base, snugging the bolt until the battery cannot rock or slide. Slide the positive cable onto the positive post, seat the power-distribution block flat onto the terminal, and re-engage all of its clips — then tighten the positive clamp. Finally, fit the negative cable onto the negative post and tighten it — negative always goes on last. Tug each connection gently to confirm it is seated.
Coat both terminals with dielectric grease or terminal spray to slow corrosion, then close the hood and start the engine — it should crank strongly. Check the headlights, climate controls, and dashboard for normal operation and no lingering warning lights. Your radio presets and clock may have reset, and the engine may idle unevenly for a few minutes while the computer relearns — check your owner’s manual if any warning persists. Take the old battery to an auto parts store or recycler.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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