Worst experience from so-called professional diesel mechanics took them a running Duramax truck to replace a injector now 3 months and 3500 later truck doesn't run they couldn't even replace the injector. Who knows what other damage could have been done to the truck. Total Incompetent people. Along with being liars. Plus got to the place they ignored my phone calls to where I had to use a different phone and number to get them to answer my calls.