It would seem to me that most if not all GM service techs would use the GM Techlink.
GM TechLink is a monthly magazine for all GM retail technicians and service consultants providing timely information to help increase knowledge about GM products, and improve the performance of the service department. This magazine is a companion to the GM Edge publication.
It used to be available to owners (that pay the bills) but they discontinued it for us. There was good info in the link plus good advice by service techs that found a better way or and easy way to do a job. I would assume they still do. Surely GM or some tech has given advice on how to solve the water in the jack compartment. I would ask my tech if they use the GM Techlink. If they do not know where to look, tell them to try
https://www.autopartners.net/apps/dwperson/?conn_type=other
They will need to sign up.
When it was available I would copy data pertinent to the SRX such as the following:
Lift Gate Handle Flex
Owners of some 2004-05 Cadillac SRX vehicles may have concerns of liftgate handle flex and/or high pull effort.
This condition can be verified by a simple test: First, unlock the vehicle doors by activating the RKE fob twice, or use the interior door trim power unlock switch.
TIP: Customers should be aware that the liftgate is unlocked only when the rear doors are unlocked.
Second, attempt to open the gate with your hand or fingers on the left-most part of the lift gate handle. If the handle flexes and the lift gate does not open from the left-most position (but does open when pulled from the center or right side of the handle), and may exhibit a popping noise as it opens, perform the following procedure.
TIP: Do not replace the liftgate latch or the handle.
To correct this condition, adjust the liftgate striker. Refer to SI document 896082 to gain access the striker. Note the location of the striker, then loosen the fasteners enough to allow adjustment.
TIP: The striker location is fixed with spring pressure as well as the fasteners and may require additional force to move it.
The striker is adjustable both fore and aft as well as left to right. Relocate the striker a few millimeters rearward to prevent the latch bind condition. In rare cases, the liftgate interior trim may need to be removed to inspect the latch-to-striker position and to finesse the location of the striker to obtain the best fit.
After the opening and closing effort has been corrected by striker adjustment, the liftgate wedgeblocks on either side of the liftgate opening may require re-adjustment: Loosen the wedge blocks in the liftgate opening and move them to the most rearward position. Close the liftgate to locate them in the correct position. Open the gate and tighten the fasteners to specifications.
TIP: If closing effort is high, or pop noise is heard when opening, the wedges are over-adjusted. Be sure to check for proper liftgate weathersrip compression after adjustments are completed.