My husband and I bought a brand new 2017 GMC Sierra in July, 2017 which came with a warranty. In November, 2019, my husband had noticed a rumbling when accelerating and took it to the service department here (which by the way, is about an hour away from our home). They ended up saying that the problem was the transmission fluid that had been put in the truck at the time it was manufactured. They performed a "transmission fluid exchange" and gave my husband the bill for $620.55 when he went to pick up his truck!!! When my husband came home with the bill, I FLIPPED OUT! Not only did they say it was not covered because the warranty had just barely ran out, but they charged us $620.55 to exchange the bad transmission fluid that was put in at the factory when it was built (NO FAULT OF OURS IN ANY WAY, STILL UNDER WARRANTY, OR BARELY PAST THE WARRANTY!!!) I contacted the service department and was given a load of garbage reasoning for this and hung up the phone angry, but not willing to give up on this. Things got busy with the holidays, etc. and so I ended up contacting GMC directly after the new year and was told after a very lengthy conversation that they had assigned a case number and would have that on record, should they ever decide to do a recall regarding this, but that they could not refund us any of the money and suggested we get back in touch with the dealership. I called Hendrick and spoke with Jim Stewart, the Service Manager, who told me they have seen a lot of this problem with these trucks where the transmission fluid was bad and had to be "exchanged". At first, he seemed empathetic and I felt like FINALLY someone was going to do the right thing and give us our money back since this was a manufacturer problem and was in NO WAY our fault. He said he needed to speak with someone over him but sounded very encouraging to me. Fast forward...he called me back some days later and informed me that Brian Zompettie said there was nothing they could do because they would not be able to get the money back from GMC if they refunded us and Jim Stewart had a whole new demeanor than he had in the previous conversation (SOUNDED LIKE HE WAS BRAINWASHED BEFORE HE CALLED ME BACK). I was HIGHLY UPSET and Jim said I could call Brian myself, which I did, but had to leave messages, and HE NEVER RETURNED ONE OF MY CALLS! NOT ONE!!! THERE IS NO WAY THAT WE SHOULD BE STUCK WITH A BILL FOR $620.55 FOR BAD TRANSMISSION FLUID PUT IN AT THE TIME THE TRUCK WAS BUILT, WARRANTY OR NO WARRANTY! I thought the charge was over the top anyway for what they did so I called a local mechanic and inquired about how much they would have charged for this same service and was informed $180-$220 at most for labor and fluid so WE REALLY FEEL LIKE WE WERE "SCREWED OVER" BY THIS DEALERSHIP AND CAME TO THE CONCLUSION THAT THEY LOVE YOU WHEN YOU'RE BUYING YOUR BRAND NEW $55,000+ VEHICLE AND THEY ARE MAKING THAT COMMISSION, BUT AFTER THE SALE, YOU WILL NOT RECEIVE FAIR TREATMENT! THIS IS JUST WRONG ON ALL LEVELS AND THAT IS WHY I TOOK THE TIME TO CONTACT GMC AND THIS DEALERSHIP MULTIPLE TIMES AND TO WRITE THIS DETAILED, LENGTHY REVIEW!!! PLEASE DO NOT GIVE THIS DEALERSHIP YOUR BUSINESS BECAUSE THEY TREAT THEIR CUSTOMERS TERRIBLY AFTER THE SALE! I FELT MORALLY OBLIGATED TO PASS THIS INFORMATION ALONG AND WISH WE HAD NEVER SET FOOT AT THIS PLACE!!!! HARD AND EXPENSIVE LESSON LEARNED, BUT I WILL GET THE WORD OUT! YOU CAN COUNT ON THAT!