Marine Goop has served well for tough glueing problems if the surfaces are clean. But it's much slower setting than a super glue. I like gel super glue when I have a need for that.

 

Take it to the dealer there are 2 bulletins on it, they'll fix it under warranty.

Mine was loose, and they fixed it no problem.

Super glue is a joke :! :lol
They should clean the surfaces and use the correct 3M adhesive. They may actually replace the whole strip.
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Roof Weld Joint Reveal Molding Replacement (Ditch Molding) - kw GMT355 trim information left panel right seam top cap #PI01914 - (03/26/2004)

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Condition/Concern:
Vehicles built before 02/09/04 have shorter moldings and different end caps that are no longer available from SPO. If one of the old moldings or end caps need to be replaced all the other moldings and end caps will also need to be replaced.

Recommendation/Instructions:
Replace the left and right moldings and end caps with current SPO stock.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

Models:
(2004 Chevrolet Colorado & 2004 GMC Canyon Regular Cab built before 02/09/04)
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04-05 Chevrolet Colorado and GMC Canyon Roof Ditch Molding May Become Loose - kw GMT355 trim paint #PIT3112 - (08/13/2004)
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:
Some Chevrolet Colorado or GMC Canyon pickups may exhibit a condition of the roof ditch moldings being loose at the joint of the front and rear piece; or the rear piece is lifting up at the back bottom edge. As a result of a change in our clearcoat, we are experiencing difficulty with the adhesion of the roof ditch moldings.

Recommendation/Instructions:
When performing pre-delivery inspections, please be sure to visually check that the roof ditch moldings are properly secured. If the ditch molding is loose, follow the steps listed below.

1. Remove ditch molding.
2. Remove the tape from the molding and clean the cavity were the ditch molding rests and the molding itself.
3. Re-tape the molding with 3M double sided tape or equivalent.
4. Use 3M adhesion promoter 3M part number 4298 or equivalent to secure the molding. Make sure the promoter carries into the intersection were the ditch molding travels under the front and rear glass moldings.
5. Tape the molding down at each end and let dry overnight at room temperature.

Note: Contact 3M Products at 800-551-8152 to locate a 3M supplier in the area.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:(04 - 05 Chevrolet Colorado)
(04 - 05 GMC Canyon)

 

Dealer replaced both roof seals on my truck, under warranty.

 

one was like that when I picked it up, they fixed it before I took delivery, the second is doing it now, and will be fixed when I take it in with my "list".

 

Had mine fixed 3 times before they got it right! Wow they sure designed it well didnt they.

 

Had mine fixed 3 times before they got it right! Wow they sure designed it well didnt they.

It's the clear coat. GM iss testing out a new clear that is much harder than it used to be and they are haveing problems getting things to stick like the roof ditch moldins, BSM and, emblems no big deal just use the right doubble sided tape from 3m and cll it good

 

Had mine fixed 3 times before they got it right! Wow they sure designed it well didnt they.

It's the clear coat. GM is testing out a new clear that is much harder than it used to be and they are haveing problems getting things to stick like the roof ditch moldins, BSM and, emblems no big deal just use the right doubble sided tape from 3m and call it good.