Having problems bleeding the system?

2003 GMC SONOMA
140,000 MILES
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LASURVIVOR47
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  • 45 POSTS
I have a 2003 gmc sonoma. I have replaced all the brakes lines and brake hardware. Having problems bleeding the system. I filled the master cylnder with fluid and I can't get it to bleed. Any ideas?
Feb 23, 2013 at 8:15 PM
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HMAC300
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you may have gotten air in master cylinder, try using a pressure bleeder and you may need to use 2-3 qts to bleed it properly now if your brake pedal isn't very good after bleeding the brake module modulator valve may have air in it and will need to be bled along with using a scanner to activate it. so it can be bled. Please check out this guide to help you

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Please go over this guide and report back.
Feb 23, 2013 at 8:24 PM
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LASURVIVOR47
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Thanks for getting back to me. Yes it just dawned on me the master cylnder was empty. I will try that. Thanks again.
Feb 24, 2013 at 10:34 PM
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