Question about 2004 Chevrolet Silverado 3500

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2004 chevy silverado service brake booster light came on should i worry?

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If your truck one that was involved for recalls and they hasn't been done yes. The boosters can fail and cause a loss of steering as well as braking. Contact your dealer and see if your truck was one that needed these repairs done.

Posted on Aug 31, 2010


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What would I change on my 02 chevy silverado so it

Most of the time it will be your master cylinder not working properly or maybe the brake booster diafram has a slight leak. You will hear a hissing sound from the booster. I would also check all the vacuum hoses. Just looking them over is not enough here. You will have to take them off and inspect both ends for splitting

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you must have a vacuum leak at booster or the line going to it. This will cause engine to not start and no power brakes (hard pedal).

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It definitely sounds like the hydro booster. There are videos on YouTube that shows you how to do either. Depending on your skill level will determine which one you do. The main issue is bleeding the air out of the booster. It can be difficult. You will also need to bleed your brakes completely afterward. GMs are notorious for having the hydro boosters die on them.

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Does a 2009 Chevy Silverado have what are referred to as continuosly powered brakes, in other words, is powered supplied when the ignition is off.

NO the power brakes runs off the brake booster which is under vacuum from the intake manifold. You will till have power brakes till the vacuum in the booster equalizes and then your going to have to just use brute force. The only electrical motor that controls your brakes are in the ABS but that just opens and closes valves to keep the wheels from locking up. Good luck and hope this helps. 

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