The installation wasn't hard it just took a while...im a neat freak and cautious with the install
I found it impossible to get the underside of the needles to clear the led's but I just trimmed the guage face around the needle hole and it worked perfectly!
EDIT: The calibration of the guages is automatic just got to make sure you record the position of the needle with the key in the "on" position before you take them off...then put them in the on in the same manner with the key in the "on" postion.
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2008 Chevrolet Silverado 1500 LT1 Z71/4x4
2000 Oldsmobile Alero GLS - Sold
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