Hey new to the forum... I looked through the forum and havent found a solution to my problem. I have a 2007 GMC vortec max with 40,000 miles. It threw an engine code. I had it checked at an auto zone and they said one of the fuel banks was receiving to much fuel. So running rich. I also noticed when coming to a stop it idles really low rpms almost acts like its going to die but never does. What are some possible solutions to this, and what could happen if I let it go with out fixing it. Also it shifts super hard from 1st to 2nd gear if I am not giving it very much throttle, but it shifts fine if I give it a little more gas. Anyone had any of these problems or heard of them. Thanks
