RTV Sealer

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

RTV sealant hardens when exposed to air. This type sealer is used where two non-rigid parts, such as the intake manifold and the engine block, are assembled together.
Do not use RTV sealant in areas where extreme temperatures are expected. These areas include: exhaust manifold, head gasket, or other surfaces where a gasket eliminator is specified.
Follow all safety recommendations and directions that are on the container.
To remove the sealant or the gasket material, refer to REPLACING ENGINE GASKETS .

NOTE: Refer to SEALANT NOTICE in Cautions and Notices.
Apply RTV to a clean surface. Use a bead size as specified in the procedure. Run the bead to the inside of any bolt holes.
Assemble components while RTV is still wet, within 3 minutes. Do not wait for RTV to skin over.
Tighten bolts to specifications. Do not overtighten.