OEM sound deadening - The 1947 - Present Chevrolet & GMC Truck Message Board Network

howzzzit · 05-26-2025, 04:59 PM

My 72 Cheyenne after carpet removal. I've owned this truck since 74 so I know it's original. I was reading that some higher trim trucks had sound deadening factory installed. Looks like a thick adhesive tar paper with a layer of foam underneath. I also have a spray coating on the inside of the doors. I put kilmat inside the doors and was going to do the cab floor, but not now. Looks pretty good and it's glued down. It's getting ACC mass backed carpet over the top next weekend.

**71CHEVYSHORTBED402** · 05-26-2025, 05:39 PM

My 71 Deluxe floor had the same material, but only in front of the bench seat, covered with a rubber mat. While yours looks fantastic, mine was a hot mess, and the rubber mat was worn out too. This pic. shows what was left of my board, yikes; much had turned to dust. Another good reason carpet > rubber mat I suppose.

A casting type material, like for a broken bone was laid underneath to insulate for the BBC RH exhaust manifold, as shown in this pic.

05-26-2025, 04:59 PM	#1
howzzzit Registered User Join Date: Dec 2005 Location: Kalifornia Posts: 447	OEM sound deadening My 72 Cheyenne after carpet removal. I've owned this truck since 74 so I know it's original. I was reading that some higher trim trucks had sound deadening factory installed. Looks like a thick adhesive tar paper with a layer of foam underneath. I also have a spray coating on the inside of the doors. I put kilmat inside the doors and was going to do the cab floor, but not now. Looks pretty good and it's glued down. It's getting ACC mass backed carpet over the top next weekend. Attached Images

05-26-2025, 05:39 PM	#2
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,692	Re: OEM sound deadening My 71 Deluxe floor had the same material, but only in front of the bench seat, covered with a rubber mat. While yours looks fantastic, mine was a hot mess, and the rubber mat was worn out too. This pic. shows what was left of my board, yikes; much had turned to dust. Another good reason carpet > rubber mat I suppose. A casting type material, like for a broken bone was laid underneath to insulate for the BBC RH exhaust manifold, as shown in this pic. Attached Images __________________ Tony 1971 C10 Custom Deluxe SWB 402/400TH A/C I developed an assembly information kit for restoring my truck from nuts and bolts. It's written in Assy. order, short & simple, packed with all OEM hardware ID; castings; part ID; 100s of part numbers; wiring simple - Resource, and trivial too. Much info. applies to all 67-72 GM, A/C vehicles, esp. trucks W/O saying. Full search ability, including to 700+ images of illus., parts, charts, Assy., points of interest, cab, bed, & front clip cart plans- Specials and cores were serviced out and R excluded e.g. front/rear glass, body/paint, engine core, rebuilt hinges, steering box, trans, etc. The project was in-line with long former professions developing process, policy, specs, demo, written for novices, admin., policy, engineers, development, systems & test - Public & govt 2, gross. Sell soft copy cheaply, PM if interested.Build thread:https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 05-26-2025 at 05:56 PM.



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