If it was me and I didn't need it for towing rite now I would continue to drive it around town and only in town and see what happens, maybe the light goes out and stays that way or it comes on and you have to limp it home. Either way you have some time to figure out what's going on before cabin fever season is over. Depending on how many miles are on it now and how long you want to keep the truck I'd get it deleted if your goin to keep for awhile, the sooner the better.... as far as delete options and programs I'd go with "Efi live " for your year of truck for programmer with the dsp5 switch. Really you have allot of options to choose from though. At least yours will be cheap to delete. My 19 duramax will cost me rite now around 7 grand to delete if I did it. And I would go with calibrated power tunes for ECM and TCM . He has allot of you tube videos that are full of really good info and he knows his stuff.... I'd recommend mbrp exhaust cause I've ran ther exhaust before on my old diesel and never had a problem with it.... good luck, do some research, and keep me posted