Wheel Specs Help Needed

[rikhek]

Can anybody tell me the specs on the stock GM 16"X7" cast aluminum wheels.  Specifically I'm looking for the offset and backspacing.  I can't find it anywhere on the GM sites and the dealer is clueless.  Thanks.  Rick

[chevy4x4trucks]

The hole spacing is 6/5.5" and I'm unsure of the backspacing.

 

Oh, and in response to the email you sent me last week.  The 305's are fitting great on the cast aluminums and aren't even close to rubbing.

[gandolphxx]

Get out a good tape measure and check out this page Wheel offset then please post. I think that you will find that the backspacing is close to 5" - my stock PYO 16/6.5's were.

 

Backspacing is from the inside rim to the mount surface - offset is +/- centerline of the rim.