Convertible trunk lid adjustment - Pontiac G6 Forum
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post #1 of 19 (permalink) Old 05-22-2019, 08:53 PM Thread Starter
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Convertible trunk lid adjustment

My trunk lid is slightly out of alignment and this is causing the top not to operate. One of the microswitches is not registering correctly.

So, does anyone have a writeup on how to adjust the trunk lid? Mine is high and rearward by a small amount (about 1/8", maybe 3/16"). At the passenger side only. The car was never in an accident, not sure why it's like this. Nothing is bent or loose.
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post #2 of 19 (permalink) Old 08-05-2019, 09:53 AM
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Quote:
Originally Posted by dxG6 View Post
My trunk lid is slightly out of alignment and this is causing the top not to operate. One of the microswitches is not registering correctly.

So, does anyone have a writeup on how to adjust the trunk lid? Mine is high and rearward by a small amount (about 1/8", maybe 3/16"). At the passenger side only. The car was never in an accident, not sure why it's like this. Nothing is bent or loose.
I notice that you had no replies to this. Wondering if you figured it out? I put the new gas shocks in but they seem to be lifting the trunk lid a bit too much at the front.
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post #3 of 19 (permalink) Old 08-06-2019, 12:31 PM Thread Starter
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Quote:
Originally Posted by Convertme View Post
I notice that you had no replies to this. Wondering if you figured it out? I put the new gas shocks in but they seem to be lifting the trunk lid a bit too much at the front.
Wow, Convertme, you just solved the puzzle. The aftermarket struts are too long.

I do remember I changed the struts and the new ones were maybe 1/8" longer than the factory ones. I had a hell of a time forcing them in. But I didn'y operate the top for a good while after that. So I didn't realize my top malfunction started when I changed the struts. You just made me realize that now.

Here is what happens. On a normal trunk lid, it's the hinge that determines the position and geometry. On our cars, the complex arrangement is a bit flimsy/flexy and a longer strut can actually force the lid slightly up at the front. I did play around and a small amount of fore/aft adjustment is possible. Up and down you can only adjust by adding or removing shims. If I remember correctly there is one shim from the factory, where the hinge is bolted to the lid. There are instructions in various factory manuals that tell you not to remove shims, presumably because they are afraid the lid might slam on the stowed top if you reduce clearance.

Bottom line, I couldn't adjust mine enough to make it work normally. I have to push down on the front part of the lid while a second person is operating the top switch. Otherwise the top won't operate. The solution is a proper length strut.

If anyone has an original strut, I would appreciate an exact measurement of the length (center to center). Thanks

Last edited by dxG6; 08-06-2019 at 12:54 PM.
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post #4 of 19 (permalink) Old 08-06-2019, 01:01 PM
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I will get back to you after the weekend. I left the old struts in the car and the car is not with me.
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post #5 of 19 (permalink) Old 08-06-2019, 01:50 PM
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I have these on my other car.

https://www.g6ownersclub.com/forum/a...7&d=1565120269


And this is what I put on my red car, that is now out of adjustment.

https://www.g6ownersclub.com/forum/a...9&d=1565120502

The Blue gold car is fine with the Michigan struts.

I hope this helps.
Convert... Will send measurements soon
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post #6 of 19 (permalink) Old 08-06-2019, 02:55 PM
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Looks like you will have to wait for the exact measurement but I think that may be the problem. However, there may be a solution that is not too expensive. Looks like the end sockets will screw off the new struts and I am hoping I can grind/lathe enough of the the end (not the shaft but the socket piece).
Will send measurement next week.
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post #7 of 19 (permalink) Old 08-06-2019, 03:32 PM
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This does make sense why I can't get the front of my trunk to stay down, the struts I ordered in post #21 in the following link must be simply too strong. The trunk sets down fine then later lifts up but my top keeps working. I just ordered the set in post #31 in the following link and will give them a try.
https://www.g6ownersclub.com/forum/1...weather-2.html
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post #8 of 19 (permalink) Old 08-06-2019, 03:41 PM
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I have a similar replacement PM1028 without the -PR


I believe I purchased them here (which looks to be the same place you mentioned)
https://www.amazon.com/Convertible-L...ype=automotive
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post #9 of 19 (permalink) Old 08-06-2019, 05:12 PM
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Quote:
Originally Posted by boomer View Post
I have a similar replacement PM1028 without the -PR


I believe I purchased them here (which looks to be the same place you mentioned)
https://www.amazon.com/Convertible-L...ype=automotive
Boomer,
It looks like the overall length might be the same but body does look a bit shorter on the new one vs. the old one in your picture.
Could this be?
Convertme
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post #10 of 19 (permalink) Old 08-07-2019, 01:19 AM Thread Starter
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Super8, my guess is the "strength" of the strut is not the issue. My new struts don't lift the lid any faster than the 10-yr old factory ones I replaced. I'm guessing the fully compressed struts just bottom out at a dimension that's just a hair too long. I do know for sure the extended length was a bit different.
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post #11 of 19 (permalink) Old 08-07-2019, 06:38 AM
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Socket from gas shock. Hard to see in picture or maybe not at all. Is more thread and room for the ram of the cylinder to go inside the socket as you thread the socket back on. But what you can see is the little bit flange left on the socket. I would not hesitate to take this off with a grinder our preferably a small lathe which I don't have. The socket bottoms out here. Take it down thRead on all four if you have to only!
If I was doing this today I would do the one that is difficult to get at first. Take it down to the thread. And try to keep the one that is easier to get at for a little bit of fine tuning. Don't forget the other side!
Good luck everyone. I have not done mine yet as I do not my car at the moment. I am hopeful and hoping that if someone does try this that they let us know if it works or not.
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post #12 of 19 (permalink) Old 08-07-2019, 10:19 AM Thread Starter
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Quote:
Originally Posted by Convertme View Post
Boomer,
It looks like the overall length might be the same but body does look a bit shorter on the new one vs. the old one in your picture.
Could this be?
Convertme
The strut marked "original" in that picture does NOT look like the original one in my car. Mine did NOT have the SUSPA brand on it. Just part numbers.

Anyway, I ordered a genuine GM strut and I'll let everyone know how that works out when I get it.
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post #13 of 19 (permalink) Old 08-09-2019, 02:52 PM
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dxG6, you were correct on the struts being too long. The second set I ordered (boxi) were 1/8" shorter and the trunk lid fits better.
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Last edited by Super 8; 08-09-2019 at 02:54 PM.
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post #14 of 19 (permalink) Old 08-10-2019, 01:55 AM Thread Starter
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Confirmed. I replaced the strut with a shorter one and everything works and fits fine now.
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post #15 of 19 (permalink) Old 08-10-2019, 07:37 AM
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Perhaps you could post the part details you eventually settled on in case others need it.
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