What are /r/GeneralMotors' favorite Products & Services?

From 3.5 billion Reddit comments

If urine test use this : Detoxify Mega Clean Herbal Cleanse – Tropical Flavor – 32 oz – Professionally Formulated Herbal Detox Drink – Enhanced with Milk Thistle Extract, Ginseng Root Extract & Guarana Seed Extract - Plus Sticker https://www.amazon.com/dp/B001982OBK/ref=cm_sw_r_cp_api_glt_fabc_FX1PGN8T5YB7JKVN6TC6

I’ve used it twice the day of the test and it’s worked each time.

If you have an Android phone I could recommend buying any bluetooth ELM 327 OBD code reader from Amazon and using the Torque Lite App to view the DTC. The description of the app says "Shows and Resets engine fault codes / DTC trouble codes stored in your car". So I assume it'll do what you need.

https://play.google.com/store/apps/details?id=org.prowl.torquefree