1973-91 Square Body Chevy & GMC Truck Crew Cab Foil Heat Sound Deadener Insulation, All Humps

Make your classic Chevrolet or GMC Crew Cab quieter, cooler, and more comfortable with this 1973-91 Square Body Chevy & GMC Truck Crew Cab Foil Heat Sound Deadener Insulation, All Humps. Designed specifically for 1973–91 Square Body Crew Cab trucks, this insulation fits all floor hump configurations, including small hump, large hump, 2WD, 4WD, manual transmission, and automatic transmission applications.

Each kit is precision cut to fit the factory floor pan and is manufactured from 3/8-inch thick insulation laminated to a reflective aluminum foil barrier. The foil reflects radiant heat generated by the engine, transmission, exhaust system, and road surface, helping maintain a more comfortable cab temperature throughout the year.

Beyond heat protection, the dense insulation material absorbs vibration and significantly reduces engine noise, road noise, and driveline sound. The result is a quieter interior, easier conversations with passengers, and a more enjoyable driving experience whether you're cruising your Chevrolet C10, C20, C30, K10, K20, K30, or GMC Crew Cab or completing a full restoration.

Installation is quick and straightforward. Position the insulation on a clean, dry floor pan, test fit before final installation, and trim only if necessary. A light application of spray adhesive or weatherstrip adhesive is recommended to hold the insulation in place while installing carpet or your preferred floor covering.

Key Features

• Fits 1973–1991 Chevy & GMC Square Body Crew Cab trucks
• Designed for small hump and large hump floor pans
• Compatible with 2WD and 4WD
• Fits manual and automatic transmission trucks
• Precision cut for easier installation. Foil side up.
• 3/8-inch insulation with reflective aluminum foil facing
• Reflects heat from the engine, transmission, exhaust, and floor pan
• Helps reduce road noise, engine noise, and vibration
• Installs beneath carpet, vinyl flooring, or rubber floor mats
• Improves interior comfort for everyday driving and restorations

Whether you're restoring a classic Chevrolet Crew Cab, updating your GMC work truck, or building a comfortable weekend cruiser, this foil-backed insulation is an excellent upgrade that helps protect your interior from heat while creating a quieter, more refined ride.