Trench, a little too generic on the question. Can you narrow it down to body, driveline, brakes or suspension? There is a lot in common between the Chevy trucks and Suburbans of similar years so you will find lots of parts that can be interchanged between them.
Tip: i'v found that if you goto http://www.partsamerica.com and look up a part, they have a link "Show vehicles this part fits" and that is a good place to find part interchange info... just my experiences... helps when going to the junk yards looking for parts.
Forgot to mention, that partsamerica link is for the commonly know parts store, Advanced Auto Parts... sorry...
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