1409KMT Radiator Core Support Mounting Kit — Fits 1981–1987 Chevy Trucks, Rubber Cushions & Steel Bolts

1409KMT radiator core support mounting kit supplies the exact rubber cushions, spacers, bolts and shims needed to mount replacement core supports on 1981–1991 Chevy and GMC trucks and SUVs.

When replacing a radiator core support on classic C/K trucks, Suburbans, Blazers or Jimmys from the 1980s and early ’90s, the right mounting hardware matters. This 1409KMT kit was assembled to match factory-style attachment points and includes steel bolts, rubber cushions and alignment shims so you can refit the support securely and reduce vibration transfer to the body.

What parts are included and how do they help during installation?

The kit bundles all the small components that are commonly missing or worn when installing a new core support. Having matched fasteners and cushions on hand speeds the job and prevents makeshift workarounds that can lead to misalignment.

• Carriage bolts and lock nuts for secure, corrosion-resistant fastening.
• Upper and lower rubber cushions to dampen vibration and protect sheetmetal.
• Offset square-hole shims and long spacers to ensure correct alignment and spacing.
• Washers and jam nuts for proper torque and prevention of loosening.

Which vehicles and model years does this kit fit?

This mounting kit is made to support the common core support designs used across Chevy and GMC full-size trucks and SUVs of the era. Confirm fitment against your vehicle’s year and body type before ordering.

• 1981–1987 Chevrolet and GMC Truck C/K (1/2 ton through 1 ton).
• 1981–1991 Chevrolet Suburban and crew cab/dually variants.
• 1981–1991 Chevrolet Blazer and 1981–1987 GMC Jimmy.
• Works with aftermarket and OEM-style replacement core supports for these platforms.

How durable and reliable are the components in this kit?

Components are made from steel fasteners and molded rubber cushions to replicate the durability expected in engine-bay mounting hardware. The kit is designed for practical, everyday use and to hold up under normal road and under-hood conditions.

• Steel bolts and nuts resist shear loads and secure the support to the frame rails.
• Rubber cushions isolate vibration and reduce metal-to-metal contact wear.
• Shims and spacers provide consistent mounting geometry for correct radiator and grill alignment.
• Sold new and packaged to simplify replacement during a core support swap.

What tools and skills are needed to install the kit?

Installation requires basic hand tools and intermediate mechanical familiarity—this is a do-it-yourself project for home mechanics with some experience. If you are replacing the core support, allow time to transfer components and torque fasteners to factory specifications.

• Common tools: socket set, wrenches, torque wrench, and a jack/stands for safe access.
• Basic skills: aligning the support, staging spacers/cushions, and torquing hardware correctly.
• Estimate: a few hours for experienced DIYers, longer if additional repairs are needed.

Who is this for: This 1409KMT kit is intended for owners, restorers and mechanics working on 1980s–early 1990s Chevrolet and GMC full-size trucks and SUVs who need a complete set of replacement mounting hardware when installing a new radiator core support. It’s especially useful if existing bolts, cushions or shims are corroded, missing or deformed. The kit helps ensure correct alignment of the radiator cradle, grille and related front-end parts without improvisation, making it a practical choice for restoration projects, repair shops and garage DIYers seeking reliable, OEM-style replacement components.