My 2011 Terrain 4 cyl had a noisy start up issue at 1100 miles .As per GM bullitens i brought it to dealer and the replaced solenoids and cleaned screens and what ever the bulliten said to do..This seemed to fix the problem till recently. My dealer had a $69.00 4 oil change special so i took advantage of that and got a oil change..Sortly there after the noise on start-up returned but more often on cold starts. I asked the dealer what oil he put in and he said it wasnt Dexos synthetic. My question i live in a cold climate and does the oil type have anything to do with noisy engine starts in cold conditions??? . Isnt Dexos the recommended oil for these motors.