I have ran into another problem related to this topic. My "NOS" GM-yes the wrong NOS type" not only had the wrong recess for the lights but the valance trim would not fir properly either. The slots for the mounting bosses are too shallow--new chrome fits fine on the old valance--have to grind on the NOS/POS. Be sure to check for both issues if you opt for these poorly made, GM stickered repops.
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fasteddy
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