For enhanced safety, the front seat shoulder belts of the Chevrolet Trailblazer are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW X1 doesn’t offer height-adjustable seat belts.
In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Trailblazer are reminded to check the back seat if they opened the rear door before starting out. The X1 doesn’t offer a back seat reminder.
The Trailblazer (except L)’s optional blind spot warning system uses digital cameras monitored by computer to alert the driver to moving objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. The X1 doesn’t offer a system to reveal objects in the driver’s blind spots.
To help make backing safer, the Trailblazer (except L)’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The X1 doesn’t offer a cross-path warning system.
Both the Trailblazer and the X1 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras and available rear parking sensors.

