The 2017 GMC Terrain typically uses a 12-volt lead-acid automotive battery, most commonly in group size 48 (H6) with roughly 700–760 cold-cranking amps (CCA). An AGM battery is not standard on most trims unless your specific build includes features that GM designated as requiring an AGM type. Always verify with your VIN or the existing battery label for the exact spec.
In this article, we break down the official specs, how to identify the right replacement, and practical steps for swapping the battery safely. We also cover where to buy a replacement and what to expect in terms of cost and warranty.
Battery size and type for the 2017 Terrain
Here are the typical specifications you should expect when shopping for a replacement. The following list consolidates the common options used by 2017 Terrain models. If your vehicle has a different engine or trim, confirm the exact size and rating from the original battery or your owner's manual.
- Group size: 48 (US) / H6 (international labeling)
- Battery type: 12-volt lead-acid, maintenance-free flooded type
- Cold-cranking amps (CCA): approximately 700–760 CCA, depending on engine option
- Reserve capacity (RC): around 90–100 minutes
These specs reflect the standard replacement battery for most 2017 Terrain configurations. Exact ratings can vary by engine option or regional requirements, so always double-check the current battery label or your VIN data before purchase.
AGM vs standard flooded batteries
Most 2017 Terrain models use a conventional flooded 12-volt battery. An AGM (absorbed glass mat) battery is not typically required unless your vehicle includes a start-stop system or other heavy electrical loads that GM designates as needing AGM. If your Terrain has certain options or a higher electrical demand, verify whether AGM is recommended for your exact build with a dealer or the battery label.
When AGM might be required
Vehicles equipped with start-stop functionality or advanced electrical packages sometimes call for an AGM battery due to its better performance under frequent cycling. If your vehicle has one of these configurations, the OEM or your dealer can confirm the correct AGM specification for your VIN.
How to replace the battery
Replacing the battery requires careful steps to protect electrical systems and ensure a proper fit. The following steps outline a safe, typical replacement procedure. If you’re unsure at any point, seek professional assistance.
Before you begin, gather basic tools (screwdrivers, wrenches) and a protective pair of gloves. Ensure the engine is off and the vehicle is in Park with the parking brake engaged.
- Park on level ground, turn off the ignition, and open the hood.
- Disconnect the negative (-) battery terminal first to minimize the risk of short circuits.
- Disconnect the positive (+) terminal and remove any hold-down clamp or bracket securing the battery.
- Carefully lift the old battery out of the tray and inspect the tray for corrosion or damage. Clean as needed.
- Install the new battery in the same orientation, secure the hold-down bracket, and reconnect the positive terminal first, then the negative terminal.
- Start the vehicle to verify proper operation and reset any electrical systems if required (radio presets, clock, etc.).
After replacement, dispose of the old battery at an approved recycling center or return it to the retailer. If you notice corrosion on terminals or a recurring battery drain, have the charging system tested and the battery tested for capacity.
Where to buy a replacement battery
When shopping for a 2017 Terrain battery, you’ll find options at dealerships, auto parts stores, and online retailers. The following list highlights common sources and what to expect from each.
Selecting a reputable retailer with a solid warranty can save you headaches if the battery needs replacement within the warranty period.
- GM Dealerships / ACDelco retailers – OEM-grade options with proper fit and warranty
- Auto parts stores (e.g., AutoZone, Advance Auto, O'Reilly) – broad selection of standard and premium batteries
- Online retailers – convenient comparison shopping, but verify compatibility and warranty
- Battery installation services or workshops – convenient if you need installation and disposal handled together
When buying, confirm the exact group size (48/H6), the recommended CCA for your trim, and whether an AGM option is appropriate for your build. Warranty terms typically range from 2 to 4 years, with varying coverage on free replacement within the initial period.
Maintenance, warranty and care
To maximize battery life, keep terminals clean and free of corrosion, ensure tight connections, and periodically inspect for signs of wear. If you live in extreme temperatures, consider a higher-CCA battery within GM’s recommended range to maintain cranking performance. Always review the warranty terms provided by the retailer or OEM to understand coverage and replacement options.
Summary
For a 2017 GMC Terrain, the typical replacement battery is a 12-volt lead-acid unit in group size 48 (H6) with about 700–760 CCA and roughly 90–100 minutes of reserve capacity. AGM batteries are not standard unless your specific build requires start-stop or higher electrical demand. Verify the exact spec for your VIN, and replace with a battery from a reputable retailer offering a solid warranty. Proper installation and disposal of the old battery complete a safe, reliable replacement process.