1409KMT Radiator Core Support Mounting Kit for 1981–1987 Chevy/GMC Trucks — Complete Hardware & Rubber Cushions

1409KMT radiator core support mounting kit supplies the pads, bushings, bolts and spacers needed to fit a replacement radiator core support on 1981–1991 Chevy and GMC trucks and SUVs.

When you replace a radiator core support on classic Chevy and GMC C/K trucks, Blazers, Jimmys, Suburbans or dually crew cabs from the 1980s and early ’90s, correct hardware is essential for secure alignment and vibration isolation. This kit gathers the rubber cushions, steel spacers, carriage bolts, lock and jam nuts, washers and offset shims you need to reinstall the core support quickly and reliably—without hunting down individual fasteners.

Which vehicles will this mounting kit fit?

The kit is designed for GM vehicles produced across the 1981–1987 truck C/K platform and many 1981–1991 GM full‑size SUVs and dually models. It covers 1/2 to 1-ton pickups and compatible Blazer, Jimmy and Suburban applications.

• 1981–1987 Chevrolet Truck C/K and 1981–1987 GMC Truck C/K
• 1981–1991 Chevrolet Blazer, Jimmy, Suburban and crew cab/dually models
• Fits original-style core supports that use rubber cushions and spacer bolts

What parts are included and what materials are used?

This complete mounting kit brings together the typical fasteners and isolators required to secure a core support in the engine bay. Components mix hardened steel fasteners with resilient rubber cushions to provide strength and vibration damping.

• Carriage bolts in required lengths and diameters
• Offset square hole shims to align mounting points
• Upper and lower rubber cushions for vibration isolation
• Long steel spacers, washers, jam nuts and lock nuts for secure clamping

How does this kit simplify installation and alignment?

By supplying matched spacers, cushions and shims, the kit removes guesswork during installation so the core support seats true and remains isolated from engine vibration. Using the included hardware reduces trips to parts stores and ensures a consistent, factory‑style mounting geometry.

• Pre‑matched spacer lengths keep radiator position stable
• Rubber cushions reduce metal‑to‑metal contact and noise
• Offset shims allow fine alignment where frame holes vary
• Complete fastener set prevents mixing incompatible hardware

Is this kit durable and backed by support?

Components combine corrosion‑resistant steel with durable rubber cushions for long service life under normal driving conditions. The manufacturer offers a short warranty and customer assistance if you encounter fitment questions.

• Steel bolts and spacers for secure clamping strength
• Rubber mounts engineered for vibration control and longevity
• 6‑month warranty and seller support for post‑purchase help

Who is this for? This 1409KMT mounting kit is aimed at DIY mechanics, restoration shops and anyone installing a replacement radiator core support on classic GM trucks and SUVs built from 1981 through 1991. If you value correct fasteners, proper alignment and vibration isolation—especially when fitting a new or refurbished core support—this kit supplies all the small parts needed to finish the job cleanly and confidently without sourcing each item separately.