1999 Tahoe EGR Value

Can anybody tell me what an EGR Value does when it gets stopped up??? My service engine light comes on when it is under load??
Thanks

--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/chevrolet-trucks/200701/1
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.