WI William Pitt the Elder was listened to by Parliament regarding the American colonies?

[Malone]

He proposed the "Provisional Act" that would both maintain the ultimate authority of Parliamentary sovereignty, while meeting the colonial demands. The Lords defeated his proposal on 1 February 1775. Chatham's warnings regarding America were ignored. His brave efforts to present his case, passionate, deeply pondered, for the concession of fundamental liberties—no taxation without consent, independent judges, trial by jury, along with the recognition of the American Continental Congress—foundered on the arrogance and complacency of his peers.[75] After war had broken out, he warned that America could not be conquered.[76]

What if the House of Lords had listened to Pitt's proposal/warnings on the American colonies?

 

[The Professor]

There's no link to what this Provisional Act entailed so I can't really answer.

 

[Mad Bad Rabbit]

There's no link to what this Provisional Act entailed so I can't really answer.

An authentic copy of Lord Chatham's proposed bill, entitled, A provisional act, for settling the troubles in America, and for asserting the supreme legislative authority and superintending power of Great-Britain over the colonies.

 

[UCB79]

The American Revolution would have been headed off. The failure of the Lords to listen to Pitt is one of the great missed opportunities of history.

 

[Emperor Constantine]

The American Revolution would have been headed off. The failure of the Lords to listen to Pitt is one of the great missed opportunities of history.

Or it, like the repeal of the Sugar and Stamp acts in 1766, would simply embolden the colonists later on, merely kicking the can down the road. Its more than a little naive to think that such a concession by Parliament would magically fix things and not lead to yet another confrontation.

 

[The Professor]

An authentic copy of Lord Chatham's proposed bill, entitled, A provisional act, for settling the troubles in America, and for asserting the supreme legislative authority and superintending power of Great-Britain over the colonies.

Ah interesting. Went further than I remembered.
It's essentially devolution.
I suspect the Lords saw it would be really difficult to claw back those powers once granted.
It would certainly head off most dissent but might just postpone things a little. Especially if there's now a single subparliament for the colonies.
Look at Scotland today.