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Message: <blockquote data-quote="stutaeng" data-source="post: 21703" data-attributes="member: 6175">So I've been driving my 99 Silverado ECSB daily again and I've noticed it's got more road noise than my 06 Suburban. The suburban is more quiet and I see there's an additional weatherstripping at the very bottom of the door, whereas my 99 doesn't have that. I can post some photos of the differences later.My 99 also didn't come with the firewall insulation on the engine bay. I've got a buddy that also has a 99 Silverado and he said his does have that insulation. Looks like PPE makes a replacement for that though.Does anyone else know if there's any other OEM differences?</blockquote>