booster

I had TSB 18-NA-355 performed on my truck in the fall of 2019 and it has developed the shudder issue again.

I have a 2015 Sierra Denali 1500 which have the factory DL3 mirrors. So far, both mirrors power folding feature have failed. I replaced the driver's side a couple of years ago with a TRQ aftermarket mirror. The TRQ mirror worked well initially, then over time, became shaky. Now the passenger side has failed and I'm looking to upgrading to the towing mirrors but I want to retain all of the DL3 features: power adjust, power folding, signal in mirror, memory and puddle lamp. The factory DQS mirrors are too pricey. What aftermarket manufacturers support these features?

I've had an opposite experience between Chevy and GMC dealers. Took my truck in a few years ago to have the transmission serviced at Nyle Maxwell GMC for the shudder issue. https://www.facebook.com/NyleMaxwellGMC/ They replaced the torque converter and trans filter and it appeared to be fixed. A year later the same issue is occurring and I called to make an appointment at the same dealer and they told me GM isn't going to replace any more torque converters so I'll just have to live with the issue. Fast forward a couple of years and I read about the 18-na-355 TSB and decide to take it to another dealer who determines that Maxwell damaged the replacement trans filter during installation. Maxwell's service manager's opinion was something should have happened while it was under warranty otherwise they couldn't care less. This would be the 2nd time I've had issues with Maxwell's service department and shoddy workmanship. The general manager indicated that they would be willing to correct the issue at no cost to me and basically strung me along for a week and then ultimately declined to cover their mistake. They authorized the other dealer to fix the issue and then declined to cover it thereby holding my vehicle under ransom until I had to pay for their mistake. Below is damage to the filter.