Missing parts/radiator size (She's alive)

[Bigboom997]

Hey guys I have a 1990 GMT 400 and I was wondering if anyone could help me find out what size radiator I need. Also I'm missing a part here and I don't know what it is. Can someone help me find out what goes here?

 

[Bigboom997]

Here's a picture

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[SUBURBAN5]

Diesel???

 

[Bigboom997]

Gas

 

[SUBURBAN5]

7.4?

 

[Bigboom997]

5.7-L V-8 OHV 16V

 

[SUBURBAN5]

C1500 silverado then?

 

[Bigboom997]

C1500 silverado then?

It says 2500 on the side and the VIN came back saying c/k2500. Sorry that I'm not that knowledgeable about these trucks it's my first time working on them.

 

[alpinecrick]

The VIN should tell you it's either a C (2wd) or K (4wd) but not both. Rock Auto will tell you what radiator you need. The pic looks like an alternator bracket minus the alternator.........

And the truck might be a light duty 2500 (7200GVW)--6 lug or 8 lug?

 

[SUBURBAN5]

The VIN should tell you it's either a C (2wd) or K (4wd) but not both. Rock Auto will tell you what radiator you need. The pic looks like an alternator bracket minus the alternator.........

And the truck might be a light duty 2500 (7200GVW)--6 lug or 8 lug?

Alternator that low? Did they have duel?