The HHR's 1LT trim is the lower of two sub-levels within the more upscale LT style.  The HHR 1LT comes equipped with everything found in the base LS, plus  an eight-way power driver seat, an audio system upgrade with MP3 compatibility and alloy wheels.  More options also become available at this level.  The LS's 2.2 liter engine can be swapped for a 2.4 liter unit, which makes 175 horsepower and provides 165 pound-feet of torque.