Throttle Body Gasket 05 Chevy 5.3L

The Throttle Body Gasket 05 Chevy 5.3L is a critical sealing component engineered for fifth-generation Chevrolet trucks and SUVs powered by the LS engine platform. This OEM-specification gasket prevents vacuum leaks and fuel vapors from escaping the intake manifold-to-throttle body junction, a common failure point on high-mileage or modified 5.3L engines. Whether you're running stock power or building a performance package, a compromised gasket will trigger check engine codes and cause rough idle, hesitation, and poor fuel economy.

Manufactured by MAHLE ORIGINAL/CLEVITE under part number G31975, this gasket is precision-cut from resilient composite material designed to withstand the thermal cycling and pressure fluctuations inherent to direct fuel injection systems. The gasket's ultra-thin profile (0.005 inches) allows it to seat perfectly between the throttle body and intake manifold mounting surfaces without requiring shims or rework. MAHLE's engineering ensures consistent compression set retention even after repeated heat cycles, eliminating the gradual leak-down that occurs with inferior aftermarket alternatives and preventing vacuum leaks that degrade driveability.

This gasket is essential for owners of 2005 Chevrolet Silverado, Tahoe, Suburban, and Avalanche models equipped with the 5.3L V8, as well as performance enthusiasts undertaking throttle body upgrades or intake manifold modifications. Installation is straightforward—remove the old gasket completely, clean the sealing surfaces with carburetor cleaner, and install the new gasket dry (no sealant required) before torquing the throttle body bolts to specification. OEM gaskets should always be replaced when disassembling the intake system; reusing compressed or damaged gaskets is a leading cause of vacuum leak diagnostics issues post-rebuild.