new to the forums and new to HHRs.
The GM Turbo Upgrade kit changes the two MAP sensors and reflashes the PCM. GM 12 months / 12,000 miles warranty in effect.
Goes crazy fast!
I know. I just did the upgrade on my "new to me" 08 which I purchased a month ago.
Goes crazy fast!
I know. I just did the upgrade on my "new to me" 08 which I purchased a month ago.
Is this available at any Chevrolet dealer and what's the approximate cost? I just picked up a 2008 HHR SS myself a few weeks ago and love it. How does this upgrade, or any 'tune' for that matter affect gas mileage? I'm currently getting 25-26 in town and 30+ on the highway and don't really care to lose that.



to the forum!