Question

2005 Cadillac CTS 3.6L, starts and cuts off right away reads P0187. My car starts but when I take my foot off the gas it cuts off

Answer 1

P0187 Fuel temperature B circuit low input

This is not a valid code for this engne . You need to recheck the code depending on the scan tool you have there is a pending code section, check that area for any code that may be present