I had the exact same problem with my SRX for the first time this spring; I reset the clock 5 or 6 times for daylight savings and each time I wouid start the car it reverted to the old time.( It also shows Washington DC as my home address, as others have mentioned.) When I went in for service last week I asked about it and was told it would need a software update at a cost of $124. I mean, really? For what we pay for a Cadillac, don't you think the car could save a time change to the clock without the need to sock us with an extra cost? My wife keeps raving about her Honda and on this one I have no retort to her.
Welcome to the forum! Did you have the update performed to your SRX? If so, did it resolve the matter of having your radio clock not stay with the time that was set?
Cadillac Customer Care
I did not have the update done. It was not worth $124 to me. As a lifelong GM owner, I have had cars that cost half as much that never had such an issue. I will settle for the digital clock being right for only six months per year and when I am ready to bid a fond farewell, will be sure to sell/trade-in during the fall/winter when the clock is right.
We had the update just this week and all is well.
Over a year with the update and still no issues.