General Motors GM-47971 Oil Pressure Pre-luber Adapter Diagnostics>Tachometers Designed for use on standard

General Motors GM-47971 Oil Pressure Pre-luber Adapter Diagnostics>Tachometers Designed for use on standardGeneral Motors GM 47971 Oil Pressure Pre luber Adapter Kent Moore Tool Number: EN 47971 This tool is compatible with Generation IV and V V8 engines. For Generation III engines, please use GM 42907. The small block V8 engines now feature a unique oil filter, and the oil pressure sending unit is not easily accessible. The GM 47971 adapter replaces the spin on oil filter, enabling the attachment of the GM 21867 A oil pressure gauge for engine oil system

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