2015–2020 Chevrolet Tahoe
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $187 by doing it yourself! Shop cost: $375
Quick answer: Replace Battery on a 2015–2020 Chevrolet Tahoe is rated Moderate and takes about 30-45 minutes. You'll need 5 tools for this job, and parts cost about $188. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Automotive Battery (Group 48 or 49 — group varies by configuration; check the group-size label on your existing battery and your owner's manual before ordering) | — | $150.00 | |
| Battery Terminal Cleaner | — | $10.00 | |
| Battery Terminal Protector Spray | — | $8.00 | |
| Battery Hold-Down Clamp | — | $20.00 |
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
The 2015–2020 Tahoe LT takes a Group 94R (H7) OE (ACDelco 94RA, 720 CCA). Location: UNDER the junction block — notoriously tight access. You'll need the new Group 94R, sockets/wrenches, and a wire brush. Negative-first-off, positive-first-on.
The battery sits UNDER the junction block — tight. Plan on removing the cross brace, the coolant overflow tank, and/or the air box for access. Disconnect NEGATIVE first, then positive.
I've been burned enough times that I always photograph every bracket and bolt as it comes off — in that tight space you'll be reassembling half by feel, and the photos are your memory.
Remove the hold-down and lift the old battery out — the tilt-out workaround helps in the tight space. Note the group: 94R (H7) OE (ACDelco 94RA, 720 CCA), or 48 (H6) if a previous owner downgraded. Clean the terminals and tray.
I know the tilt-out workaround is the whole trick on this truck: tilt the battery toward you and walk it out on its edge instead of lifting straight up through the junction block.
Place the new battery in the tray — Group 94R (H7) is OE. Secure the hold-down snug. The tight access makes seating awkward — the tilt-out in reverse helps.
Reconnect POSITIVE first, then negative, and make sure both are tight. Reinstall the cross brace, overflow tank, and air box in reverse order — don't forget the brace. Double-check the terminals; the tight location makes a loose one hard to spot.
Start the engine and verify normal operation. If a previous owner installed a 48, consider upgrading back to the 94R for the correct 720 CCA.
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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