Shopping for a used SUV can be stressful and overwhelming. You want something stylish and comfortable, but you also want something that’s reliable and safe. Using the IIHS list of the Top Safety Pick and Top Safety Pick+ vehicles is one way to get a great SUV, but there’s an important tool you can use to avoid the most dangerous SUVs as well – the Driver Death Rates. Here’s how it works and which very large SUV you might want to take off of your shopping list.

The 2017 Chevy Suburban 1500 2WD has the highest death rate of all 2017 very large SUVs

On the IIHS list of very large 2017 SUVs with the highest driver death rates, the 2017 Chevy Suburban comes in first place. It’s not an honor that an SUV would want. Most people want to avoid the most dangerous used SUVs, and with the 2017 2WD Suburban’s high death rate, it may be off the list.

The 2017 Suburban’s overall death rate is 25 per million registered vehicles. It’s the highest of all of the 2017 very large SUVs studied, and far above even the 4WD version. The 2017 Chevy Suburban 4WD overall death rate is just 8 per million registered vehicles.

The Suburban’s single crash death rate makes it the most dangerous SUV on this list

The IIHS looks at four categories when making this list: the overall death rate with confidence limits, the multi-vehicle crash death rate, the single-vehicle crash death rate, and the rollover death rate. The 2WD 2017 Chevy Suburban‘s single-vehicle crash death rate is by far the area where it performs the worst.

The Suburban’s single-vehicle crash death rate is 25 per million registered vehicles. That’s the entirety of the SUV’s data. It’s important to note that the IIHS’ data doesn’t include passenger deaths because the number of passengers in each crash varies, so it’s hard to say how passengers have fared in these crashes.

The IIHS doesn’t have new SUV results

The IIHS doesn’t have data about new SUVs. That’s because “It takes considerable time to gather and tabulate the real-world data needed to provide statistically significant results for new models.” In addition, death rates are usually made available nine months after the end of the calendar year. It takes the IIHS time to compile all of the data and produce meaningful results.

The IIHS includes data on the last three model years. Of course, that’s as long as it hasn’t been majorly changed. That allows the IIHS to conduct a larger study and have more accurate results. In addition, the death rates are adjusted for the age and gender of the driver.

If you’re buying a used SUV, you undoubtedly want to avoid the most dangerous SUVs. Now, does the 2017 Chevy Suburban‘s high driver death rate mean that it’s dangerous? It’s hard to say, as the death rate may have more to do with the way people tend to drive the vehicle as opposed to a specific fault with the vehicle. Yet being aware of this data may help to inform your used car buying decision.