The OTC Fuel Pump Installation Gauge, No. 6710, is designed to verify that the camshaft fuel pump lobe is at base circle position before installing the high-pressure fuel pump. The tool also indicates the pump may be installed when it is flush to manifold surface, and is similar to factory tool EN-51092. The fuel pump installation gauge works on 2014-2015 Chevrolet Silverado and GMC Sierra V6 and V8 engines, 2015 Chevrolet Suburban and Tahoe, GMC Yukon and XL, Cadillac Escalade and 2014 Chevrolet Corvette V8 engines.