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Nick_R_23 · 08-21-2023, 10:59 AM

Same size. The master cylinder is a Napa M2904 that fits 1988-1994 Chevy/GMC trucks and Suburbans with hydroboost. This master cylinder also has the same specs as the OE 13” brake master cylinder, really the only difference is that this unit is aluminum instead of cast iron.

08-21-2023, 10:59 AM	#10
Nick_R_23 Registered User Join Date: May 2016 Location: Willow, Alaska Posts: 847	Re: Why the won’t my rear brakes work?? Same size. The master cylinder is a Napa M2904 that fits 1988-1994 Chevy/GMC trucks and Suburbans with hydroboost. This master cylinder also has the same specs as the OE 13” brake master cylinder, really the only difference is that this unit is aluminum instead of cast iron.