Brake Drum Size

Discussion in 'General Chevy & GM Tech Questions' started by ncof300d, Jun 10, 2009.

  1. ncof300d

    ncof300d New Member

    Without removing the rear wheel is there a way to tell whether I have 10" or 11" drums?
    My VIN is 1GCEK14R2VE205747.
  2. werty

    werty Rockstar 100 Posts

    1GCEK14R2VE205747VIN:1GCEK14R2VE205747Year:1997Make:Chevrolet TruckModel:K1500 1/2 Ton 4WD - PickupEngine:5.7 L 350 CID V8VEHICLE INFORMATIONCountry:UNITED STATESMake:ChevroletVehicle Type:pickup TruckModel:K1500Engine Type:V8, 5.7L; CPIYear:1997Assy. PlantPontiac, MIProduction Seq. Number:205747Body Type:2 Door Cab; RegularTrim Level:BaseDriveline Type:4WDGVWR Class:Class E: 6,001-7,000 lbBrake System:HydraulicSeries:1/2 tonVehicle Class:Full-size PickupEngine Series Code:WRN L31Fuel Type:GasolineManufacturer:General Motors CorporationEngine Code:R
    I CANT THEY LIST BOTH SIZES:grrrrrr::grrrrrr:
  3. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Why don't you want to pull a wheel?
  4. MrShorty

    MrShorty Epic Member 5+ Years 1000 Posts

    If the Max diameter is stamped into the drum in a convenient place, and you can see through the gaps in the wheel, and one of those gaps is in a convenient place, then you would be able to read the max diameter off the drum without removing a wheel. Otherwise, the easiest (and most of the time quickest) way to find out is to pull a wheel and see what is stamped into the drum,
  5. Mean_Green_95

    Mean_Green_95 Epic Member 5+ Years 1000 Posts

    I would 10, A guy I know has the a Z-71 and he has the 10in drums too.
  6. ncof300d

    ncof300d New Member

    I was hoping to only pull the wheel when I go to replace the brakes.
  7. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Murphy's Law says if there are 2 choices you will always get the wrong one, <G> Another reason to pull the wheels is you may need a hardware kit and if you don't pull the wheels,, you will need wheel cylinders for sure! :)
  8. Z71_guy

    Z71_guy Epic Member 5+ Years 1000 Posts

    most likely you have 10in but like jimmiee said if you dont look it will be wrong
  9. ncof300d

    ncof300d New Member

    I changed the front brakes an now I want to take care of the rear. I pulled a wheel and I did not see a 10 or 11. I did find a part number 15588223. I googled the number but could not find out which size. Any guesses? I held up a tape and I am guessing that they are 10' drums.....just want to confirm.
  10. jedepsub

    jedepsub Rockstar

    You can also measure the thickness of the drum. There is over 1/4" difference in thickness between the 10" & the 11" shoes. The 10" x 2.24". The 11" x 2-3/4".

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