I need your help bad. I bought brand new a 2017 GMC Sierra from Ebersole honda, this is my second Sierra. I now have 60,000 miles on it, I dont drive it much, and had a terrible experience with the truck power almost going out. The code is P-0324, the shop is saying that its a dead miss, and my right side lifters need replaced for 3,900 or 5.600 for both sides!!! I know ive read all about LIfter problems on these trucks. How can i contact General Motors to get some assistance with the matter?