
Yes, you can fit three car seats across a Equinox, but it is a challenging task that requires careful planning and specific types of seats. The Equinox is a compact SUV, and its rear seat, while comfortable for three adults on short trips, has limited real estate for three bulky child safety seats side-by-side. The key to success is using narrow-profile or convertible car seats designed for three-across configurations.
The most critical measurement is the hip room in the second row. For recent model years, this is typically around 51.5 inches. When you divide that by three, you have roughly 17 inches per seat, which is narrower than most standard infant car seats. Therefore, you cannot use just any three seats. You'll need models known for their slim designs, such as the Diono Radian 3RX, Clek Fllo, or Graco SlimFit. Even with these, the installation process can be fiddly. You will almost certainly need to use the vehicle's seat belts instead of the Lower Anchors and Tethers for Children (LATCH) system, as the lower anchors are not spaced to accommodate three seats.
| Factor | Consideration for 3-Across in Equinox |
|---|---|
| Vehicle Hip Room | Approximately 51.5 inches |
| Ideal Seat Width | Less than 17 inches per seat |
| Recommended Type | Slim-profile convertible seats (e.g., Diono, Clek) |
| Installation Method | Likely requires using seat belts instead of LATCH |
| Ease of Access | Difficult to buckle children in center seat |
| Model Year Variance | Dimensions can vary slightly between generations (e.g., 2018-2023 vs. 2024+) |
Before committing, the absolute best practice is to take your actual car seats to the dealership or try the configuration in your own Equinox. This hands-on test is the only way to guarantee a safe and secure fit for all three children.

We managed to do it in our 2021 Equinox, but it was a puzzle. We used two Diono Radians and a super-narrow infant seat. The trick was ditching the LATCH anchors and using the seat belts for all three. It’s tight—getting our middle kid buckled is a hassle every time. It works for school runs, but I wouldn’t want to do it for a long road trip. It’s possible, but just barely.

As a former car seat technician, I can confirm it's physically possible. However, "fitting" and installing correctly are different. The center seat is the challenge; its shape can cause a car seat to not sit flush. You must achieve a solid, non-moving installation on all three, with less than one inch of wiggle room at the belt path. If you can't get a secure fit for the center seat, it's not safe. Prioritize a proper installation over forcing them all in.

Honestly, if you know you'll need three car seats regularly, I'd look at a minivan or a larger three-row SUV like a Pilot. The Equinox can be made to work in a pinch with the right slim seats, but it’s a compromise. You’ll sacrifice easy access, passenger comfort, and trunk space. For everyday convenience and safety, the extra room and wider seats of a bigger vehicle are worth the investment.

Focus on the specific seats. Standard models won't work. You need to research "three-across" car seats. Brands like Diono are famous for this. Measure the width of your Equinox's rear bench yourself—don't just trust the specs. Then, compare those measurements to the car seat dimensions listed on the manufacturer’s website. It’s a numbers game that requires precise matching to be successful.


