OTCs No. 7219 Oil Pressure Adapter is a convenient solution to the problem of checking oil pressure on GM Gen III V8 engines. This tool installs in place of the oil filter, providing ports to attach an oil pressure tester gauge to in lieu of trying to access oil pressure through the sending unit port that has a non standard thread. Dual ports for bottom or side tester connection. Installs with 11/16" (17mm) hex drive socket. Fits GM 4.8L, 5.3L, 5.7L, 6.0L engines, 1996-2006. Similar to Kent-Moore J-42907. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it’s a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians’ productivity and shop profits.