How do you replace a booster on a 1985 Chevy blazer S10?

Answer 1

I'm going to assume you mean the brake booster and not some turbo-charger that's been installed. -Disconnect and cap all the fluid lines going to the brake master cylinder. Remove the master cylinder. -Disconnect the hose(s) connected to the brake booster assembly. -In the cab lay down in the driver's side footwell and look up behind the brake pedal. You'll see 4 gold nuts somewhere right near where the pedal touches the firewall. Remove those nuts. -Back outside, gently wiggle the booster assembly until it comes off. The gasket can be sticky. There's a spring and a center pushrod on the backside of the unit so don't let those fall down into the engine bay. -Replacement is of course reversing these steps.