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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by Grumpy
just make sure the bulbs are seated correctly.. If you didn't mess with the adjusters , you shouldn't have to re-aim...of course, I could be wrong.
In case you do have to adjust ... use your garage door. Put a line of masking tape for reference. Since HID's have a wider and higher beam pattern spread, you can/should lower them a bit to keep from blinding oncoming traffic. You'll still have a good field of view.