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Master Cylinder / ABS Dsiagreement

Discussion in 'Chevy Trucks' started by wsmm, Nov 18, 2010.

  1. wsmm

    wsmm Member
    Messages: 80

    I have a shop manual for my 1990 Chevy 1/2 ton 4x4. The combination valve assembly hanging below the master cylinder does not match the manual. The right valve assembly looks correct, but the left one is different. The box shows it similar in size to the right hand valve and has a bleed screw, but the one in my truck is different and appears to have 2 solenoids on it and no bleed screw. Can someone enlighten me on what I actually have?