Window Bump Stop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72malibu · 12-20-2025, 08:27 AM

I'm putting my dad's '75 Gentleman Jim back together.

There's a rubber bumper that attaches to a bracket inside the door, at the bottom, for when the window is lowered all the way.

All I'm finding is a dinky little round bumper. I got a pair from AMD that are listed for a very wide range of trucks - early 60s to 90s. But the door seems to have had a much larger diameter bumper and it's toast. I can't find that wide diameter bumper anywhere.

Anybody know what I speak of? It's possible the wrong style bumper was in the truck, because the doors were replaced at one point. I don't have a clue.

Willie Makeit · 12-22-2025, 10:37 AM

Can't help on the bump stop but am interested in seeing your dad's Gentleman Jim.

Bloodhound · 12-22-2025, 02:16 PM

Quote:

Originally Posted by 72malibu

I'm putting my dad's '75 Gentleman Jim back together.

There's a rubber bumper that attaches to a bracket inside the door, at the bottom, for when the window is lowered all the way.

All I'm finding is a dinky little round bumper. I got a pair from AMD that are listed for a very wide range of trucks - early 60s to 90s. But the door seems to have had a much larger diameter bumper and it's toast. I can't find that wide diameter bumper anywhere.

Anybody know what I speak of? It's possible the wrong style bumper was in the truck, because the doors were replaced at one point. I don't have a clue.

I replaced mine with new from LMC. It's the same part number from 73-87. The ones I got from them matched the OEM ones I was replacing.

**Getter-Done** · 12-22-2025, 09:54 PM

Holley has a picture on their website.

Link: https://www.holley.com/products/exte...d96befc0aa65ff

Bloodhound · 12-22-2025, 10:49 PM

Quote:

Originally Posted by Getter-Done

Holley has a picture on their website.

Link: https://www.holley.com/products/exte...d96befc0aa65ff

Looks like the ones I got from LMC.

**Getter-Done** · 12-22-2025, 10:59 PM

Quote:

Originally Posted by Bloodhound

Looks like the ones I got from LMC.

That's good info.

72malibu · 12-30-2025, 10:26 AM

Thanks.

I think the ones in this truck were replaced with whatever the body shop in the 1990s could get at the time. The ones in it are the same height as original but much wider diameter. I'll replace them with fresh repros.

I got the driver side door back together with new Precision weatherstrip, AMD green glass, a restored vent window by Precision, and NOS regulators and tracks. The windows operate smoothly. Precision used the later style locking handles on the vent windows, which isn't correct but I don't mind.

I'm using Precision felt on the outer and OER felt on the inner because it looks to me like OER is the only place that sells inner felts that don't require cutting the door panels on the early year square bodies for the panel clips. Maybe that info. will help somebody.

12-20-2025, 08:27 AM	#1
72malibu Registered User Join Date: Jun 2019 Location: Gaithersburg, MD Posts: 159	Window Bump Stop I'm putting my dad's '75 Gentleman Jim back together. There's a rubber bumper that attaches to a bracket inside the door, at the bottom, for when the window is lowered all the way. All I'm finding is a dinky little round bumper. I got a pair from AMD that are listed for a very wide range of trucks - early 60s to 90s. But the door seems to have had a much larger diameter bumper and it's toast. I can't find that wide diameter bumper anywhere. Anybody know what I speak of? It's possible the wrong style bumper was in the truck, because the doors were replaced at one point. I don't have a clue. Last edited by 72malibu; 12-20-2025 at 08:32 AM.

12-22-2025, 10:37 AM	#2
Willie Makeit Registered User Join Date: Oct 2013 Location: Alabama Posts: 1,309	Re: Window Bump Stop Can't help on the bump stop but am interested in seeing your dad's Gentleman Jim.

12-22-2025, 09:54 PM	#4
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 9,870	Re: Window Bump Stop Holley has a picture on their website. Link: https://www.holley.com/products/exte...d96befc0aa65ff __________________ ________________________________________________________________________________________ ____________________________________________ The early bird gets the worm, But the second mouse gets the cheese 85 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

12-30-2025, 10:26 AM	#7
72malibu Registered User Join Date: Jun 2019 Location: Gaithersburg, MD Posts: 159	Re: Window Bump Stop Thanks. I think the ones in this truck were replaced with whatever the body shop in the 1990s could get at the time. The ones in it are the same height as original but much wider diameter. I'll replace them with fresh repros. I got the driver side door back together with new Precision weatherstrip, AMD green glass, a restored vent window by Precision, and NOS regulators and tracks. The windows operate smoothly. Precision used the later style locking handles on the vent windows, which isn't correct but I don't mind. I'm using Precision felt on the outer and OER felt on the inner because it looks to me like OER is the only place that sells inner felts that don't require cutting the door panels on the early year square bodies for the panel clips. Maybe that info. will help somebody.



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