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Old Aug 20, 2025 | 08:29 AM
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Default HTC upkeep

What should us HTC owners do to the top mechanism as part of maintenance on our cars? TIA
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Old Aug 20, 2025 | 10:13 AM
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Originally Posted by ladder13
What should us HTC owners do to the top mechanism as part of maintenance on our cars? TIA
I looked at mine and saw the gears had some grease on them .......done . I might put some spray silicone on the weather stripping once a year and clean the mating surface if i remember
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Old Sep 1, 2025 | 09:28 PM
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Default Htc

=ladder13;1609039537]What should us HTC owners do to the top mechanism as part of maintenance on
I can't answer you question, but as someone who is considering upgrading from a C5 to a C* What is an HTC
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Old Sep 2, 2025 | 12:08 AM
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Originally Posted by smp629
=ladder13;1609039537]What should us HTC owners do to the top mechanism as part of maintenance on
I can't answer you question, but as someone who is considering upgrading from a C5 to a C* What is an HTC
Hard Top Convertible
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Old Sep 2, 2025 | 09:14 AM
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Good question.....HTC upkeep

Anyone find a GM "how to", with recommended oils/ grease?

Gears, cables, hinges, and weatherstrips.

With only 6K mileage, I have not noticed any area of the mechanism building up with dirt/ debris.
I have noticed the weatherstrips near the rear window are not as supple as when new...I assume a lot of heat in that area.
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Old Sep 2, 2025 | 06:43 PM
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I would be interested as well. I just had my 7,500 mile service done, not sure if they even lubed anything for the hard top. Is this even on the list to do at that service?
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Old Sep 5, 2025 | 08:44 AM
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Bump TTT

No one has found any guidance?

At the very least GM recommended gear grease.

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Old Sep 5, 2025 | 08:58 AM
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I suppose just do your own research as to which product best to use for those area of contacts.
My main concern is finding a better solution for that wirerope that comes apart because of an inferior crimp on certain HTCs. In my observation.
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There is no recommended service for it. I never saw any grease on the gears when mine was new in 2021. Any grease you put on them is going to attract dirt and dust and create a grinding compound. If you feel a need to lube them, I'd use a dry lube that won't attract dirt.
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