P/S Pressure Hose o-ring specs

[alvocado]

I replaced the P/S pump and hoses on my '11 Yukon and the Gates pressure hose did not come with a new oring for connecting at the back of the pump. I reluctantly reused the OEM oring but it is not sealing. Does anyone know the spec for this oring, size and material or if it's possible to source just the o-ring? Searching has not turned up any information. I have an NBR o-ring assortment if the material is compatible with P/S fluid. 

[Jsdirt]

Stuff like that I've had better luck finding at a place that makes hydraulic hoses for farm tractors and/or heavy equipment. Our local NAPA Auto Parts does that here in MA. Bring the original one with you - even though it may be beat up, it will at least get you in the ballpark. They might even get it right on the first shot. Wouldn't hurt to bring the hose, too, to get an accurate I.D. measurement, too.

[tbarn]

GM part number 26001594. This is the high pressure line on pump.

[alvocado]

Since the GM part is $7 for one o-ring, I found a suitable substitute from a Harbor Freight HNBR o-ring assortment set for those who need to replace this seal. Here are the specs:

 

GM part: 7.65mm ID x 1.63mm thickness (0.301 in x 0.0642 in)

Standard HNBR #A011: 5/16" ID x 1/6" thick (0.3125 in x .0625 in)

 

You can buy the 205 piece set for the cost of the single GM part.