It's crazy to use a two-chamber master cylinder when you have low-drag front calipers on that 1500.
Those calipers were designed and intended to use with a three-chamber Quick Take-Up master cylinder. There's also the potential issue of the caliper pistons being "sticky" in the bores. Really common. Not outright seized, but requiring more fluid pressure to move than they should. Same deal for the caliper mounting sleeves and rubber insulators--the calipers need to "float" freely on the guides, not be stiff 'n' sticky.
Leave the GMT800 master cylinder in the garage, get the RIGHT master cylinder for your truck.
Remember, the rear brakes are the usual problem with 1500s. Out of adjustment, poor design. Upgrading to the 11.x Duo-Servo rear brakes is a wonderful thing.
I tried bleeding the ABS in my '97 by pushing the lil' buttons on the combo valve. I got nothin'. You're going to need a scan tool to bleed the ABS properly.
Those calipers were designed and intended to use with a three-chamber Quick Take-Up master cylinder. There's also the potential issue of the caliper pistons being "sticky" in the bores. Really common. Not outright seized, but requiring more fluid pressure to move than they should. Same deal for the caliper mounting sleeves and rubber insulators--the calipers need to "float" freely on the guides, not be stiff 'n' sticky.
Leave the GMT800 master cylinder in the garage, get the RIGHT master cylinder for your truck.
Remember, the rear brakes are the usual problem with 1500s. Out of adjustment, poor design. Upgrading to the 11.x Duo-Servo rear brakes is a wonderful thing.
I tried bleeding the ABS in my '97 by pushing the lil' buttons on the combo valve. I got nothin'. You're going to need a scan tool to bleed the ABS properly.