2016–2019 Cadillac ATS-V
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $112 by doing it yourself! Shop cost: $300
Quick answer: 12V Battery Replacement on a 2016–2019 Cadillac ATS-V is rated Easy and takes about 30-90 minutes. You'll need 4 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 |
|---|---|---|---|
| Replacement 12-volt battery for 2016-2019 Cadillac ATS-V; verify group size, CCA, terminal layout, and VIN fitment | — | $180.00 | |
| Anti-corrosion terminal protectant or felt washers | — | $8.00 |
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 ATS-V keeps its battery in the trunk, not under the hood: Group 48/H6 AGM, around 700 CCA. Buy an AGM with a vent connection and route the vent tube outside.
Park level, Park, parking brake set, ignition off. Disconnecting clears the clock, radio presets, and some driver settings. Gather a 10mm socket, Torx set, and plastic trim tools so you don't crack the trunk panels. Wear eye protection and gloves.
Remove the trunk floor panel, then the tie-down Torx bolts and plastic rivets holding the driver-side trim to pull it back. The battery sits in a well beneath. Photograph the routing and vent tube first.
Loosen the negative clamp first and tuck it aside clear of both terminals. Disconnect the vent tube, remove the hold-down, then the positive cable. Lift the Group 48/H6 AGM battery out — over 45 pounds, so lift with your legs.
Lower the new Group 48/H6 AGM battery into the well. Refit the hold-down just until the battery can't shift. Reconnect the vent tube firmly so gases route outside the trunk. Connect positive first, then negative, and coat the terminals.
No scan-tool battery registration is needed on the ATS-V; if your manual suggests otherwise, follow it. Refit the trim, rivets, tie-down bolts, and floor panel. Reset the clock and radio presets. Cycle each window fully so one-touch relearns.
My two cents on this step: Plastic trim tools, not a screwdriver, on those trunk panels — a slipped flathead leaves a permanent gouge in the trim. Work the rivets out gently; replacements are cheap but the marks aren't.
Start the ATS-V — quick, strong cranking. Idling, you should see roughly 13.5 to 14.5 volts across the terminals and no battery warning light. Run headlights and blower to confirm steady behavior. Return the old battery for recycling.
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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