I pull a 1700lb Aliner hard sided pop-up camper with my 2.4l cobalt ss auto. This velicle should have a similar tow capacity as your HHR.

There again, the limit is braking. I bought it used without electric brakes, but even living in flat Louisiana, I can see where they are needed - even with the good brakes on my SS. I plan on adding electric trailer brakes within a month.

I get 25mpg at 60mph (my top speed while towing,) and 31mpg at 45 on level ground with my 2.4l cobalt. I have a Westers tune, CAI, header and full exhaust, which helps in the hp and gas mileage dept. Oh yeah, a good tranny cooler is a neccessity. I have a Hayden plate type, which works well.

Attachment 40661 to the site sushidog!!!