Gear ratio identification

[bamabound]

Another option, if you know you have the original rear end, is to go to any GM dealership. Go to parts & provide them with your vin#. They can provide you with a complete RPO list of how your vehicle was built.

 

[Zx1000hd]

The RPO TAG in the engine compartment just to the right of your master cylinder on the firewall should have the OEM code.

 

[kennythewelder]

The RPO TAG in the engine compartment just to the right of your master cylinder on the firewall should have the OEM code.

My 97 has no tag under the hood. The RPO codes, are on the glove box door.

 

[PlayingWithTBI]

My 97 has no tag under the hood. The RPO codes, are on the glove box door.

Funny, evidently they quit doing that sometimes, my 88 has both but, the RPO tag under the hood isn't as complete as in the glove box.

 

[98chevy2500SS]

Huh, didn't know they continued the RPO tag under the hood on the 88's.

 

[PlayingWithTBI]

Huh, didn't know they continued the RPO tag under the hood on the 88's.

yeah but it shows even less than I remembered. At least I know I have an 88 with a 5.7L and a solid color truck, lol.

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