Drain brake fluid with siphoning bottle from brake fluid reservoir.
Remove, Disconnect
Remove brake fluid reservoir. Press back retaining clips with screwdriver - only on GMF version. Remove rubber seals from master brake cylinder.
Install, Connect
Install new gaskets in master brake cylinder - coat with brake cylinder paste beforehand. New retaining clips on brake fluid reservoir - only on GMF version.
Install brake fluid reservoir in master brake cylinder. Retainers of reservoir must audibly engage. Bleed brake system and check for leaks - see operation "Brake System, Bleed" and "Brake System, Check for Leaks".
Remove, Disconnect 
Install, Connect 
