Recently had a driver’s side window replaced in my 99 GMC Sierra. Also had the regulator and a door handle replaced as they were broken as well, but I knew this going in. Was informed I needed a new master switch and had them order/install.
Today I turned the key on and the window began rolling down on it’s own. I hit the switch to stop it, which it did, but only as long as I held the switch down. Now the window is all the way down and will not roll back up. Passenger side window works fine from either switch. Door locks work as well for whatever that’s worth.
Is there a fix I can perform myself, or am I stuck taking it back to the shop and hoping they installed a crummy part and replace it for free? Just spent $300 on this, don’t want to pay again for a part that failed a week later.