They share the same casting number as an 83-88 G-body! Well, namely, ones that fit my G-bodies.
Just something I never bothered to look at before. Maybe y'all knew that, but I never checked out much on S-10s. I knew they had those RH drive style master cylinders for S-10s that everyone loves to get, but never knew the regular ones were the same. Makes sense since the S-10 was virtually a G-body steering and suspension parts (to a degree) toss into a small truck. I knew they had "different" master cylinders, but never thought that all they did was fit it with a different shaped reservoir.
So....if anyone knows anything about GM aluminum master cylinders, MANY people don't have a clue what part number their M/C was to begin with. For example, all my G-body Oldses use master cylinder GM p/n 18013429 (83-88 gas engines). Most other G-bodies use this p/n as well if not a diesel. Production part number was 18009816. Yours may differ.
Fortunately, there's a casting number on the bottom of the cylinders that may give you the tip you need. And that number is 18010023.
Always on the lookout for GM NOS stuff, I can hardly ever find brand new GM 18013429 masters on ebay. But for fun, I typed in 18010023. It showed me a bunch of master cylinders not even for G-bodies. In particular, an NOS master but was an SR code. It looked the same, but the reservoir is different.
This is the one I bought for $95. It was advertised as p/n 1810023 because of the cast in numbers on the bottom, but the SR code piece is actually service part number 18013433 for S-10/Blazer with power brakes. Original production part number was 18009879.
Here's a used one showing the 18010023 casting number.
I actually traced it down by using the repair (rebuild) kit part number 18010083. All the other guts parts are the same part numbers. Both the S-10/Blazer and the non-diesel Cutlass used the same master cylinder bores, just used a different reservoir. Even the lid/gasket interchanges. Just so happens I have an NOS reservoir and cover kit just laying around with nothing to do. So now I can just pop off the reservoir on this new one and pop my reservoir on it and have a brand new G-body Olds master cylinder. For much cheaper than the last time I saw an NOS G-body m/c.
If anyone wants an NOS "SR" reservoir by itself for your S-10 or Blazer, I'll give it to you. I'm never going to use it. Just hope I can pop it off without tearing it up. The way the grommet and resi nipple fit in there, it can be a PITA to get them apart.
Just something I never bothered to look at before. Maybe y'all knew that, but I never checked out much on S-10s. I knew they had those RH drive style master cylinders for S-10s that everyone loves to get, but never knew the regular ones were the same. Makes sense since the S-10 was virtually a G-body steering and suspension parts (to a degree) toss into a small truck. I knew they had "different" master cylinders, but never thought that all they did was fit it with a different shaped reservoir.
So....if anyone knows anything about GM aluminum master cylinders, MANY people don't have a clue what part number their M/C was to begin with. For example, all my G-body Oldses use master cylinder GM p/n 18013429 (83-88 gas engines). Most other G-bodies use this p/n as well if not a diesel. Production part number was 18009816. Yours may differ.
Fortunately, there's a casting number on the bottom of the cylinders that may give you the tip you need. And that number is 18010023.
Always on the lookout for GM NOS stuff, I can hardly ever find brand new GM 18013429 masters on ebay. But for fun, I typed in 18010023. It showed me a bunch of master cylinders not even for G-bodies. In particular, an NOS master but was an SR code. It looked the same, but the reservoir is different.
This is the one I bought for $95. It was advertised as p/n 1810023 because of the cast in numbers on the bottom, but the SR code piece is actually service part number 18013433 for S-10/Blazer with power brakes. Original production part number was 18009879.
Here's a used one showing the 18010023 casting number.
I actually traced it down by using the repair (rebuild) kit part number 18010083. All the other guts parts are the same part numbers. Both the S-10/Blazer and the non-diesel Cutlass used the same master cylinder bores, just used a different reservoir. Even the lid/gasket interchanges. Just so happens I have an NOS reservoir and cover kit just laying around with nothing to do. So now I can just pop off the reservoir on this new one and pop my reservoir on it and have a brand new G-body Olds master cylinder. For much cheaper than the last time I saw an NOS G-body m/c.
If anyone wants an NOS "SR" reservoir by itself for your S-10 or Blazer, I'll give it to you. I'm never going to use it. Just hope I can pop it off without tearing it up. The way the grommet and resi nipple fit in there, it can be a PITA to get them apart.
