Help! I Lost All of My Car Keys

1. A 2017 2500 HD Chevy Truck Goes into Low Power Mode. Dealer can't find the problem. 2. Help! I've lost all the keys to a 2002 Saab 9-3. How do I get new keys? 3. Should I put my car into neutral when I come to a stop? Will it hurt my car? 4. I have a 2013 Duramax Diesel that has been Deleted. Will the dealer reprogram it when I go in for an Air Bag Recall? 5. My 2005 2500 HD GMC Deisel Door Locks won't work just on the rear doors. They unlock only. What could be wrong? 6. My 2004 S-10 ZR5 has fuel codes. Using an Autel Scanner a p0102 and a p300 come up. How do I check it? 7.How can I get my Oil Change Light to come on at lower mileage?