Seller notes

OEM Brake Vacuum Supplemental Booster Assisted (SBA) pump for 2003 - 2006 GM 1/2 Ton Full Size Trucks with RPO JC3 or JC4. This bolts directly and plugs in directly to assist the brake booster with additional vacuum when needed. In good used working condition. Pumps have been hooked up to 12V power and spin over as they should. GM has discontinued selling these new. A great replacement part or use it on older muscle cars, hot rods, or engines that need more vacuum with high performance cams or s...

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