Heated seats not working when using remote start

nytronorm · November 13, 2014

If someone can figure out how to modify the BCM I have a looong list of things to change. Far too many nanny systems with this truck.

fondupot · November 13, 2014

that leads me to think they are just either not close to the top of the leather, or dont get as hot as other manufacturers.

They just don't get as hot when remote starting. When I get in and have the truck running and start moving. They get HOT on the 3 light setting after a few mins.

Edited November 13, 2014 by fondupot

DougOhio · November 15, 2014

Cold day here in Ohio and I was wearing a light jacket. When I got into the truck and fired up the seats on "full 3 power" I noticed the high portion of the seat back didn't heat up. The butt and lower back was fine. Anybody else have that as an issue?

ShotgunZ71 · November 17, 2014

Cold day here in Ohio and I was wearing a light jacket. When I got into the truck and fired up the seats on "full 3 power" I noticed the high portion of the seat back didn't heat up. The butt and lower back was fine. Anybody else have that as an issue?

Sounds normal. What you describe is what I've always experienced with heated seats that do the bottom and lower back. Normally, you can tell the sections apart by the horizontal stitching/seams. My 99 was the same way, also.

diggman08 · November 19, 2014

anyone figure out how to get them on with remote start? it was 27 this morning and nothing. I turned them on before turning truck off. does auto have to be selected? because my heater didn't heat the truck up either ??

and heated steering wheel doesn't come on either.

thefishhawk · November 19, 2014

I don't think my seats are working either but yes, I think auto does need to be selected for the hvac and the heated steering wheel is manual only. I don't know if there's a difference between using the fob and using remotelink.

TJay74 · November 19, 2014

In order for the HVAC heat to work you have to leave the HVAC system on in the mode you will want to be used when remote starting the truck. This system does not work like prior GM vehicles where the system would automatically choose Heat or AC depending on outside temps.

So if you want heat, leave the system on at the temp and fan speed you want along with either dash/floor/ or windshield being chosen.

td33 · November 20, 2014

Just got my truck back from dealer so I wasn't able to test this out till today. I got home today set the heat at 77 degrees no auto setting and lowest fan speed set to the floor. I started truck few hours later with remote start it's now 28 degrees outside, after 5 minutes I get in truck nice and toasty. A few things I noticed the fan speed was alot higher than I had left it and the heat was hitting windshield defrost setting not coming from the floor. The seats aren't super hot like they are when I turn them on high, but I believe they are on. When I turn key in ignition to on, my heat settings return to the way I left them 77 degrees low fan, expect rear defrost is on. So I have to say I'm liking everything it does in cold weather so far.

Isriam · November 20, 2014

In order for the HVAC heat to work you have to leave the HVAC system on in the mode you will want to be used when remote starting the truck. This system does not work like prior GM vehicles where the system would automatically choose Heat or AC depending on outside temps.

So if you want heat, leave the system on at the temp and fan speed you want along with either dash/floor/ or windshield being chosen.

I thought the same, until this winter. Go to your truck and crank with key, turn it to HI, sync, auto. Then hit the fan power button to turn the system "off". Turn off then remote start the truck. That sucker fires up full blast defrost. Remember, the last setting was "off"? I wish I had the patience to test more like different temps, but I was really surprised to find out when the system is off, it still turns on during remote start.

thefishhawk · November 20, 2014

In order for the HVAC heat to work you have to leave the HVAC system on in the mode you will want to be used when remote starting the truck. This system does not work like prior GM vehicles where the system would automatically choose Heat or AC depending on outside temps.

So if you want heat, leave the system on at the temp and fan speed you want along with either dash/floor/ or windshield being chosen.

mine must be working differently then, I've used auto for the last six months set at 70. cool in the summer, warm in the winter. Although you seem to contradict yourself, if you are setting the temp and the heat is coming on, then it must know it's cold outside. I thought I had read here to use auto with the remote start for best results, or maybe I'm just misunderstanding you. Or more likely no one actually knows all the combinations that work, or half the trucks are one way and half the other, haha

Edited November 20, 2014 by thefishhawk

TJay74 · November 20, 2014

I don't use the "Auto" mode on my HVAC as I don't like the system telling me how cool/hot and the fan speed I want. on my previous GM trucks and my G8 GXP it didn't matter what state you left the HVAC when you went key off. When you remote started the vehicle the system would automatically turn on in either heat mode on the windshield or AC mode on the dash vents.

This truck does not work that way, at least not if you are using the "manual" mode.

Isriam · November 20, 2014

I don't use the "Auto" mode on my HVAC as I don't like the system telling me how cool/hot and the fan speed I want. on my previous GM trucks and my G8 GXP it didn't matter what state you left the HVAC when you went key off. When you remote started the vehicle the system would automatically turn on in either heat mode on the windshield or AC mode on the dash vents.

This truck does not work that way, at least not if you are using the "manual" mode.

what im saying is that in some circumstances it does. if you see what i said the system was off when the truck was turned off, and when you remote start, it actually turns on. i believe the truck stays in some modes it considers auto and will warm up your truck for you like the old models. my next test is going to be leaving the system on hi, and turning off the compressor.

thefishhawk · November 20, 2014

gotcha todd

TJay74 · November 21, 2014

I use the remote start everyday since I bought the truck. During the coldest days of winter or the hottest days of the summer the truck has never "automatically" turned on the HVAC while it was in remote start mode. Main reason I know why is during the summer months when I drive into work it is cool enough that I drive in with the windows down and the HVAC is turned off. When I come out to the truck while it is running under remote start mode the HVAC is not running at all.

I can tell you that since it got cold last week that while under remote start mode the heated seats were on and working.

I need to have the dealer look into the HVAC module. This summer I noticed while running the AC that if I pressed the button to turn the AC off but left the HVAC system on so that the fan could continue to blow air thru the vents that the AC never turned off. Air would stay just as cold as it was with the AC turned on. Tested this out for 30 minutes so I know it wasn't residual cold air from the internals of the vents. Then I would turn the HVAC off then back on and with in minutes the air would stop coming out cold and would come out at what ever the outside ambient temps are at the time.

Makes me wonder if I have a defective HVAC control module. I am going to have the dealer look into on the next oil change.

GMCustomerService · November 21, 2014

Hey TJay74,

Sorry to hear about your HVAC concerns! Feel free to send us a private message close to when you plan to get this checked out by your dealer. We'd be happy to reach out on your behalf and follow up. We'll be on the lookout for any updates in the meantime.

Sincerely,

Eddie A.

GM Customer Care