My 2018 Terrain Denali would not turn over 3 weeks ago and had to call for road service. Started when jumped, but not until the brake was pumped 3 times and then button pushed. Took it to the dealer who charged the battery for 2 hours. Battery tested OK. Was told that GM is aware that they have a problem with batteries being drained and they are working on a solution to the problem. Did not have a problem after that. Received my OnStar Diagnostic Report on 6/5/18 which indicated a Recall on the SDM LOSS OF COMMUNICATION (controls air bags) The report also indicated that the vehicle may "require immediate service" for "Low Battery" and "service soon" Called the dealer for appointment for the recall and the battery. When I took it in, I showed the Service Advisor the Diagnostic Report and he stated that both issues would be checked. The invoice I received only shows that the SDM was reprogramed with updated software. There was no mention of the battery problem. When I asked, I was told there's nothing wrong with the battery.
I strongly suspect that GM is having a major problem in finding the drain on the battery and that mentioning the service performed on the battery on the invoice would have been the second of the required 3 tries
at repairing the problem under NJ's Lemon Law.
Anyone else having battery problems on their 2018 Terrain?