Results 1 to 5 of 5
Thread: Spongy brakes
08-27-2013, 11:14 AM #1
On my 05 Silverado my brakes feel spongy and the reservoir level keeps going down but there are absolutely no leaks. Could this be my master cylinder is shot? Thanks in advance.
08-27-2013, 12:07 PM #2
- Join Date
- Dec 2011
- Blog Entries
Maybe the master cylinder, could also be a leaky caliper or rear brake cylinder/caliper. You should check all the brake components for leaks.
Link to my thread when my brakes were going out it has some helpful info from other members:
1996 Chevy Tahoe LT 5.7L V8 4X4 202,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.
Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door
08-27-2013, 12:39 PM #3
There has to be a leak somewhere if the fluid is going down. It is not magically disappearing. You need to do what Conlan said and check everything. It could be leaking thru the master cylinder and into the brake booster. If that is the case you should see fluid if you look under your dash where the rod goes from your bake pedal thru your firewall.
1995 Silverado 4x4
6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge
2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
2002 Silverado ext cab 2wd (Sold)
2003 Yukon XL (Totaled)
08-27-2013, 01:12 PM #4
From what I have read brake fluid does not evaporate, so if the fluid level is dropping, you have a leak.
2013 Silverado LTZ White Diamond Crew Cab
Advent OGM1 Navigation
Husky Liners GearBox Underseat Storage
EGR Rail Caps
K&N Air Filter
Flowsound 40 Muffler
Hypertech Max Energy Tune (only top end limiter removed and AFM disabled)
Chrome Tailgate Handle Cover
TonnoPro HF-155 Tonneau Cover
WeatherTech Front and Rear Splash Guards
Husky Liners X-Act Contour Floor Liners
WeatherTech Side Window Deflectors
Pikey liked this post08-27-2013, 04:31 PM #5
now on the booster any leak with the booster will cause a hard pedal.
pedal to the floor is usually the master is bad.