2019 SLT - No A/C + A/C Controls Glitchy + NO SOUNDS

jbr1888 · August 26, 2023

A few days ago I pressed the Auto button on the left A/C knob and it turned the A/C off and the screen said "Climate Off." So I pressed the On/Off button and it said "Climate Off" on the screen and there were no temps displayed on the knobs. I pressed Auto again and it turned the A/C on but the screen said "Climate Off" again. It functions normally now.

A week ago I remote started the truck when it was 100 outside. Less than 5 minutes later I went outside to get in the truck and it wasn't running. I got in and cranked it and A/C would not turn on. It wouldn't do anything. I turned the truck off several times and restarted it, and that didn't fix it. I drove about 5 miles and parked it for 30 minutes and when I got ready to leave the A/C worked fine.

About 2 weeks ago, I remote started the truck at night then began driving and noticed that nothing would make sounds. The blinker wouldn't tick. No sounds from the stereo or bluetooth music or calls and no sounds from CarPlay. I turned the truck off and on several times, and it didn't fix it. The truck was normal the next morning.

Truck has 85,000 miles on it. Anyone else having similar issues? These could all be unrelated.

repairman54 · August 27, 2023

Original battery? Just because engine cranks up and starts doesn't mean the battery is healthy.

Low voltage on cranking up can confuse onboard modules when you start it as all the modules are booting up at the same time. Get a load test on the battery.

Battery in top condition is critical for today's computers on tires.

Grumpy Bear · August 27, 2023

51 minutes ago, repairman54 said:

Original battery? Just because engine cranks up and starts doesn't mean the battery is healthy.

Low voltage on cranking up can confuse onboard modules when you start it as all the modules are booting up at the same time. Get a load test on the battery.

Battery in top condition is critical for today's computers on tires.

Had this happen with a new battery with a dead cell. Start right up and then set off every alarm in the car. Took awhile to find as no one suspected a new battery.

jbr1888 · August 29, 2023

On 8/27/2023 at 7:54 AM, Grumpy Bear said:

Had this happen with a new battery with a dead cell. Start right up and then set off every alarm in the car. Took awhile to find as no one suspected a new battery.

I did replace the battery a few months ago when the truck started having trouble cranking with the push button. I'll disconnect the battery and test it.

GMCustomerService · August 29, 2023

On 8/26/2023 at 4:46 PM, jbr1888 said:

A few days ago I pressed the Auto button on the left A/C knob and it turned the A/C off and the screen said "Climate Off." So I pressed the On/Off button and it said "Climate Off" on the screen and there were no temps displayed on the knobs. I pressed Auto again and it turned the A/C on but the screen said "Climate Off" again. It functions normally now.

A week ago I remote started the truck when it was 100 outside. Less than 5 minutes later I went outside to get in the truck and it wasn't running. I got in and cranked it and A/C would not turn on. It wouldn't do anything. I turned the truck off several times and restarted it, and that didn't fix it. I drove about 5 miles and parked it for 30 minutes and when I got ready to leave the A/C worked fine.

About 2 weeks ago, I remote started the truck at night then began driving and noticed that nothing would make sounds. The blinker wouldn't tick. No sounds from the stereo or bluetooth music or calls and no sounds from CarPlay. I turned the truck off and on several times, and it didn't fix it. The truck was normal the next morning.

Truck has 85,000 miles on it. Anyone else having similar issues? These could all be unrelated.

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