What Is It...

[ht89]

...and what can I replace it with?

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It's the (mostly deteriorated) mat between the interior side of the fire wall and the A/C-Heater box.

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[someotherguy]

Insulation against both heat and sound...I suppose you could use some of the current Dynamat type stuff or seek one from a donor cab. I've seen a few that have come apart badly like that but usually they're in good shape. If you go back with something non-original there may be a few minor challenges making stuff fit correctly, maybe not.

Richard

 

[24 Karat Brown]

...and what can I replace it with?

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It's the (mostly deteriorated) mat between the interior side of the fire wall and the A/C-Heater box.

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Find a junkyard truck and try to rip it out of that. Probably a good idea to note the dash and what trans the truck has before snagging it

 

[east302]

It’s probably discontinued, but a dealer may be able to search other inventories to see if any still have it. Here’s the part number...

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