What are the problems with the Chevy Silverado defroster?

Front defroster was inoperative. As a result, the heat was blocked off, causing impaired vision. 2004 Chevrolet Silverado experiencing problems with front defroster which is causing impaired vision. Dealer explained to consumer that the design of the defrost system was to prevent the winshield from cracking at the bottom.

Why is the defrost button on my Duramax not working?

My A/C and heat work, blows from the dash vents and/ or the floor. But when I turn the knob to defrost it will only blow from the floor vents (and the a/c button does not light up like normal when on defrost). I know this isnt old school where a vacuum hose controls the damper doors to switch where the air blows. Any ideas what could cause this?

Why is my defroster on my car not working?

It sounds like a tab came off the defroster which is a common reason for defroster failure. Since I work for a company that makes defroster repair kits, defroster repair accessories and aftermarket defrosters I talk to a lot of customers with this issue.

Are there any problems with the Chevy Silverado defogger?

Chevrolet Silverado owners have reported 10 problems related to defogger (under the visibility category). The most recently reported issues are listed below. The contact owns a 2013 Chevrolet Silverado. Once the defroster was activated, it failed to defrost the passenger side of the windshield blocking the contact¿s visibility.

How does a defroster work on a GMC Truck?

Line up the heater/defroster valve lever with the mode actuator cam slot. Line up the A/C valve lever with the mode actuator cam. 2. Install the mode actuator mounting screws to the HVAC module. Tighten the screws to 1.6 N·m (14 lb in). 3. Connect the electrical connection at the mode actuator (10). 4. Install the Body Control Module.

Why does my Chevy Silverado heater not work?

Check the HVAC BLWRfuse in the underhood fuse panel. If this fuse is good, the most likely problem is a bad blower speed control module (8). This module is located under the passenger side of the dash near the blower motor. Dave Nova, Chevrolet Technician

What to do if defrost on GMC Truck is not working?

1. Remove the floor air outlet duct extension (1) from the floor duct (2). 2. Remove the Body Control Module. 5. Disconnect the electrical connection from the mode actuator (10). 6. Remove the mode actuator mounting screws from the HVAC module. 7. Remove the mode actuator as an assembly with the actuator cam. 1.

What to do if your truck fan only blows defrost?

Honestly, don’t know if your control head has a built in recal feature, but a cheap way to find out. Re: Fan Only Blows Defrost, Won’t Change To Floor Or Vent. When you reattach the battery and crank the truck dont touch anything for five minutes. Then shut the truck off, crank it and see if its fixed.

What kind of defrost does a 1983 Chevy K10 have?

I have a 1983 Chevy k10 with a 350 engine. My defrost doesn’t seem to work right it just seems to blow everywhere and not very much at that either. The vent and heater settings work great but defrost doesn’t.

What to do if your GM fan won’t defrost?

See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors. It’s worth a try.