2018 Silverado LTZ (Intermittently) Will NOT Remote Start

[Ravenkeeper]

I have not figured out what is causing it, yet, but over the last couple weeks, I've tried to remote start my truck as I'm walking out to the parking lot, with negative results.  Press LOCK, and then hold START with lights as normal, but NO start.  I unlock the truck and the horn beeps three times.  I'm able to remote start after unlocking the truck first.  Most often, remote start works as advertised.  No error messages of any kind on the DIC.  I'm going to pull the card from my dashcam tonight and review the last couple weeks of footage.

[MikeBMW]

Just spit balling here ... Remote keyfob battery?
Relearning the keyfob?

[Ravenkeeper]

On 2/7/2023 at 10:57 PM, Ravenkeeper said:

I have not figured out what is causing it, yet, but over the last couple weeks, I've tried to remote start my truck as I'm walking out to the parking lot, with negative results.  Press LOCK, and then hold START with lights as normal, but NO start.  I unlock the truck and the horn beeps three times.  I'm able to remote start after unlocking the truck first.  Most often, remote start works as advertised.  No error messages of any kind on the DIC.  I'm going to pull the card from my dashcam tonight and review the last couple weeks of footage.

Did it again yesterday when I was heading to work and again tonight when we left the restaurant.   Yesterday, the was a BIG sonic boom, set the horn off.  Tonight, no one bumped it, horn beeped three times, and I had a “THEFT ATTEMPTED” message, this time.   

[Ravenkeeper]

On 2/8/2023 at 7:47 PM, MikeBMW said:

Just spit balling here ... Remote keyfob battery?
Relearning the keyfob?

Lights still work from across the parking lot, so battery is good.  
 

Don’t know that it’s trying to relearn the fob as it works most often.   

[MikeBMW]

As to relearning the key fob, I mean remove it from memory and relearn it through either the Head unit settings or a diagnostic tool.
I've done this a few times with my Autel Maxisys to make unbehaving key fobs behave.
Sadly, one time I did this, I inadvertently un-programmed my keypad on the driver door and had to take it back to the dealer to get it sorted.
Apparently, I can program key fobs but not the keypad on the door.

[GMCustomerService]

On 2/8/2023 at 1:57 AM, Ravenkeeper said:

I have not figured out what is causing it, yet, but over the last couple weeks, I've tried to remote start my truck as I'm walking out to the parking lot, with negative results.  Press LOCK, and then hold START with lights as normal, but NO start.  I unlock the truck and the horn beeps three times.  I'm able to remote start after unlocking the truck first.  Most often, remote start works as advertised.  No error messages of any kind on the DIC.  I'm going to pull the card from my dashcam tonight and review the last couple weeks of footage.

This is certainly not what we like to hear, Ravenkeeper.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your truck. To do so, please send an email to [email protected] with ATTN: Ravenkeeper/GM Trucks in the subject line.

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[Ravenkeeper]

UPDATE:  There was a good/strong sonic boom, a few weeks back, set off my truck's "alarm," and would not let me remote start without unlocking the truck first.  Once again, it beeped three times, when I unlocked it, BUT there was a message displayed on the DIC, "Theft Attempted."  I haven't had any issue with the remote start since this event.  I'm thinking that I may have not noticed the "Theft" message on the other remote start failures.