Our ZZPerformance V28 LED bulbs are a massive upgrade over previous style LED bulbs. The V28 features an extremely slim dual ball bearing fan assembly and no bulky heat sink to interfere with fitment. The PCB board is only .6mm thick leading to optimal beam pattern and extremely accurate cut off.  9007 - Low/High bulb for '97-03 Grand Prix, Low/High for the '05-'10 Cobalt, and Low/High bulb for '04-'07 Saturn Ion 9006 - Low beam for Regal (1997-2004), Monte Carlo, '04-'05 GP(see below note), Bonneville, Impala 9005 - Low/High bulb for 2nd generation Chevy Cruze, high beams for Sonic.  9012 - Cadillac ATS with halogen bulbs, and Chevy Volt H1 - Most common for Aftermarket projectors H11 - Low beam for Sonic and 2016+ Camaro with halogen headlights, fog lights on 2nd generation Chevy Cruze.  H13 - 1st generation Cruze and Chevy HHR/HHR-SS 880 - W-body Foglight D3S - Cadillac ATS/CTS/ATS-V equipped with factory HID Our LED kits will not work properly with the '06+ Grand Prix's that use varying voltage DRLs. To use LEDs on these systems you have to put black tape over the light sensor on the dash or use a headlight relay harness.To disable both DRL: Remove DRL fuse (10a) and lock light flash by removing PGM Mall fuse, turn key to acc, press lock on key fob until you hear 1 chime.  Or there is a anodized red/purple box under the driver side dash far left side that you can simply unplug.If you are located outside of the USA we recommend verifying what bulb your vehicle takes prior to ordering.Fitment note: Most models feature an adjustable ring that can be moved via loosening the small allen bolts near the seating ring. If your plug is not in an ideal location, please adjust and reseat.  Benefits: 6500k color 5000 LM brightness. 25W power 30,000+ hour operating life. 2 year warranty. This product is manufactured in China. Sold in pairs.