GM 5.3L LT Cylinder Head Gasket Set – GM# 12700996

GM 5.3L LT Cylinder Head Gasket Set – GM# 12700996

GM 12700996 is the genuine cylinder head gasket set for 5.3L Gen V LT V8 truck and SUV engines. It’s the OE kit to use when you’re doing head gaskets, a cam/AFM delete job, or a full top-end refresh on late-model 5.3L L83/L84-style engines. The multi-layer steel head gaskets and matching upper-engine gaskets are built to seal combustion, coolant, and oil just like the original factory parts.

• Brand: GM Genuine Parts

• GM Part Number: 12700996

• Description: Engine cylinder head gasket set (complete upper set for heads)

Engine & Fitment (verify by VIN/RPO)

• Engine Family: 5.3L Gen V LT V8 (e.g. L83, L84, L82, L8B – gas)

• Typical Applications:

  • Silverado 1500 / Sierra 1500 5.3L (2014-up, Gen V)

  • Tahoe / Suburban / Yukon / Yukon XL 5.3L

  • Other GM 5.3L LT truck/SUV platforms 

What’s Included:

• Pair of multi-layer steel (MLS) cylinder head gaskets – LH & RH

• Intake manifold gaskets

• Exhaust manifold gaskets

• Valve cover gaskets

• Throttle Body gasket

Use Cases

• Head gasket failure repair (coolant loss, mixing, or compression leak)

• Camshaft swap and AFM/DOD delete jobs where heads come off

• General top-end rebuilds and refresh on high-mileage 5.3L LT engines

Notes

• Designed specifically for 5.3L Gen V LT gasoline engines

• Head bolts on these engines are torque-to-yield (TTY) and should be replaced at the same time (sold separately)

• Quantity: One complete gasket set for one engine (both cylinder heads)

• Country of Origin: Genuine GM OE – country of origin varies by batch; check packaging for exact “Made in” marking