Had to have my GXP repaired after I hit a huge German Sheppard ($3300. worth) and I had the windshield replaced while it was there. I told my body man to put a regular windshield in it because I thought the HUD would still work and he dissagreed. After it was all said and done the HUD still works with a regular $225. windshield instead of a $600. windshield, so if you have a HUD car you can use a regular windshield if you have to replace it.