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By Kevin Olsen
I wish to learn how to replace second rear seat overhead HVAC control switch.
I looked for YOUTUBE videos but found nothing. I called A-1 Auto for advise and they suggested I try a GM truck forum site.
I want to know how to replace the switch. Can it be replaced without removing the whole headliner?
I replace the front overhead HVAC switch control with no change. The rear fan failing to come on.
I know its a control switch because in the past when the front overhead switch was in the on position, the rear fan wouldn't respond, except on occasion over a period of time while driving the fan all of a sudden would work.
It would blow cold AC fine, but when you turn the vehicle off and start it again it would no longer respond.
I hope someone has more info.
By Joshua Pessin
After 1 month of owning my new 2019 AT4 without any issues, I had the Nav SD card not installed error. The next day, the nav system went through s long loading process. Since then, with every vehicle startup, I now have a 10-25 second process of the nav system loading before it can be used. Previously, it was always nearly instantaneous. Also, the radio will be randomly self-muted. I brought it to the dealer last week and they did an infotainment system software update claiming to have fixed the problem. Nope, it’s still taking 10-20 seconds to load navigation and the radio was muted this morning. Anyone with 2019 Sierra AT4’s or Denali’s noticing a change in navigation loading, specifically now seeing loading screens where there haven’t been before? Is this just normal Nav function and somehow, for some reason, I just didn’t have it happen or didn’t notice it the first month? Could GMC pushed an OTA update that now cause the Nav to take longer to load?
By Glenn Wilkins
I installed an aftermarket billet grill on my 2014 GMC Sierra. The horizontal segments of the grill are pretty close together. The truck looks great but now I have wind noise. 20-40 mph I get a humming noise and then higher speeds I get more of a whistling sound of various pitches.
Doing some internet hunting, I've seen suggestions of stiffening the horizontal sections by gluing on vertical supports. I've also read about coating the back side of the grill with silicone or some other rubberized-like coating. But I'm not sure how that would fix it. Is it just interrupting the trailing edge of the horizontal members and that stops the noise? Some have suggest adding a mesh behind the grille as well.
Anyone have this problem and a sure fire solution (other than getting a new grille!).
This weekend someone slammed my passenger door probably to hard in my opinion. Not sure if this is the cause of the problem but the issue did start soon after. The Window and mirror lost power first intermittently, now completely. I checked the fuse and also didn’t see anything obvious as far as wires being loose or broken from the harness. Any suggestions or recommendations for a fix would be greatly appreciated.
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