different coolant reservoir cap size?

[Mischiefse7en]

I recently got a 90 Sierra with a 5.7, it didnt have a cap on the coolant reservoir. I went to the junkyard, and all they had was tahoes and yukons, but they all had the same cap so I just got the best looking one. Well the cap i got is too big, like the coolant reservoir mouth is smaller on my truck. Anybody have a part number maybe, or a picture of the right cap i need?

they all look like this, but with the hose on it

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[Mischiefse7en]

anybody?

 

[///RAGMC]

Try the ''HELP" section at autozone I think Ive seen them there

 

[DR CHOP]

The earlier trucks had a cap that had no hose attachment to it which I believe was smaller. It actually had the word Coolant on it. And I have seen those in the help section or look it up with Dorman online.

 

[great white]

It's an open cap design. Go to rockauto.com and you can look it up. It will give you pictures and part numbers.

 

[Mischiefse7en]

Found it on rockauto, I have another junk yard to look at tomorrow, otherwise I'll buy a new one, thanks guys