Web if you own a chevy truck manufactured between 1988 and 1998, you may consider upgrading the master cylinder. Gm ck1500 master cylinder upgrade. 7774 views 15 replies 8 participants last post by hoss4x4, jul 5, 2005 jump to latest h. There was no mention in any thread i read about changing the booster during the upgrade. Larger 1.34 bore master cylinder to compensate for rear disc brake conversions and front caliper.
