Here is a post from that thread about the service information (not a TSB). Notice there are two choices for the lubricant, including the less expensive (even for those that can not get it from work) Dielectric Silicone Grease.
Quote:
Originally Posted by Squirrel Boy
just got my car back from the "top pinch fix" (finally got time to get it done) and I got them to give me a tube of the stuff they put on the gaskets. Its "Dielectric Silicone Grease" GM part #12345579... will this stuff still work
Quote:
Originally Posted by MomsSol
Dielectric Silicone Grease ... Thanks! Same stuff we use at work and I can get for FREE!
In the back of your Owner's Manuals (2006-2008), both the Dielectric Silicone Grease #12345579 and the GM Weatherstrip Lubricant #3634770 are the recommended "Fluids & Lubricants" for weatherstip maintanance.
So either one should do, and the Dielectric is a lot less and easier to come by.
Here is the most recent version of a 1999 Service Bulletin:
Quote:
Subject: Use of Silicone for Weatherstrip Maintenance
Models: 2008 and Prior GM Passenger Cars and Trucks (including Saturn)
2008 and Prior HUMMER H2, H3
2005-2008 Saab 9-7X
In the past, questions have been raised regarding the proper care and maintenance of weatherstrips. The purpose of this bulletin is to clarify which materials are recommended for use when required.
Periodically, a thin coating of silicone grease can prolong the life of the weatherstrip. The silicone will reduce wear in the contact areas as well as reduce squeaking and sticking conditions. During very cold or damp weather, more frequent applications may be necessary.
Important: Be careful in areas where clothing may come in contact with the weatherstrip, as silicone or dirt may be transferred to clothing.
Parts Information
Part Number / Description
12345579 (U.S.) / 10953481 (Canada)
Goodwrench Dielectric Silicone Grease (or equivalent) / Lubricant Silicone Grease
3634770 (U.S.) / 10953518 (Canada)
Goodwrench Weatherstrip Lubricant (Krytox*) (or equivalent) / Lubricant
*The use of KRYTOX for coating weatherstrips is allowed, but not required.