OTC's 7297 Oil Pressure and Prelube Adapter enables technicians to easily diagnose engine oil system issues Adapter installs in place of the spin-on oil filter to allow existing oil pressure gauges (not included) to be attached to test oil system pressure Adapter can also be used to connect prelube equipment to the engine to ensure safe initial startup Applications include: 2005 and newer GM 4.8L, 5.3L, 6.0L, and 6.2L Gen IV and V engines Similar to OE tool number EN-47971