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My manual says L.R.I.S, L.R.O.S, R.R.I.S, R.R.O.S, L.F, R.F. That's exactly opposite from the way I learned to do it, but it works on my car, so I do it in that sequence.
I bleed brakes beginning with the farthest from the master cylinder. On Corvettes, the inner rear caliper halves have to be beld before the outers. The order I use is:
right rear inner,
right rear outer,
left rear inner,
left rear outer.
Front calipers only have one bleeder.
right front,
left front.
I've never had a problem using this order for bleeding..
My Haynes repair manual also starts at Left rear inner,Left rear outer,but on the forum I see it starting with right rear inner right rear outer. I rebuilt my front calipers and replaced pads bleeded right front first than left full brake pedal now I want change all the brake fluid out now on the rear
I agree with Mack76 my GM manual also states LRIS/LROS/RRIS/RROS/LF/RF
and for what it is worth boys and girls GM did build our modes of transportation the last time I checked. :chevy