Jump to content

What is going on just after I turn my truck off

A321Driver
 Share

Recommended Posts

A321Driver Enthusiast

A321Driver

Posted
Posted

So the other day I'm sitting in my truck and turn it off as I'm taking care of call.  Then I start hearing all this activity under the dash.  It sounds like bunch of relays cycling and small motors running.   It happens a few minute to several minutes after I turn the vehicle off.

Anyone know what exactly is happening?  I am sure it is normal, just curious

milkmaster Enthusiast

milkmaster

Posted
Posted

My '21 Sierra SLT does that if I turn off the truck and sit inside instead of getting out.  The seat never moves like it does when I open the door, but I hear the clicking you describe in the dash.  It's like it can't decide to lower the seat or not.  I just happen to notice it last week.  After that amount of time passes, the seat does not move like normal if I get out.  All goes back to normal when I restart the truck and get out later.  I noticed all this while the wife was shopping and deciding to stay in the vehicle while she was chasing bargains :)  You know how the radio will stay on for a time if you don't open the door?  That's the amount of time that expires before I hear the clicking.  There may be other things happening, but I haven't worried too much about it.   

A321Driver Enthusiast

A321Driver

Posted
  • Author
Posted

yeah about that amount of time, sat there and listed again, definitely sounds like a bunch of relays opening or closing and sounds like doors opening or closing in the heating/ac system.  I haven't noticed the seat position but I have not set up the exit position as I already sit back being 6'3".

Anacortes Army Guy Enthusiast

Anacortes Army Guy

Posted
Posted

This is normal, and like already mentioned it sounds like relays, ventilation components actuating.  Mine does it at just under sixty seconds after shut off.  I do not think it has anything to do with the seat as I have the base power seat without the fancy ejection seat option.

  • Like 2
ericarenee Enthusiast

ericarenee

Posted
Posted
19 minutes ago, Anacortes Army Guy said:

This is normal, and like already mentioned it sounds like relays, ventilation components actuating.  Mine does it at just under sixty seconds after shut off.  I do not think it has anything to do with the seat as I have the base power seat without the fancy ejection seat option.

same as mine no power seat

  • Like 1
JimCost2014 Senior Enthusiast

JimCost2014

Posted
Posted

I have the base power seat without the fancy ejection seat option.

 

Seems like we all have one regret on things we should have got after the purchase🤔😬

  • Haha 1
Transient Senior Enthusiast

Transient

Posted
Posted

I think you all are wrong.  It's the hamsters getting off their wheels and taking a little time to rest, eat, and drink.  It takes a lot for them to be able to move or trucks and haul our rears around. 

  • Haha 3
rbdjr Enthusiast

rbdjr

Posted
Posted

Fuel pressure bleeding off exsesive, and turbo vanes actuating cleaning procedure automated. 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      2024 Silverado 2500 HD with the 6.6 Gas (L8T) Engine

      By Chuck FB · Posted

      How many miles were on the truck when you bought it and was there some form of oil change history generated through a dealer or an independent shop although not much would show up if the owner had changed their own oil. Just curious if it was a maintenance issue or if there was something off from the start, surely one would think the original owner would have realized it was using a lot of oil, its hard to go back in time and find out the true story of mysteries like this. Well hopefully the warranty company will go for it and just install a new engine, that would be the ideal outcome.    I still have so few miles on my truck as per not quite 9000 and will be changing the oil shortly which has around 2700 miles on it or so and its down so little on the dipstick from where it was at the beginning of this oil change that I could make the "claim" that it uses no oil but in reality would be a very small amount, less than a 1/16 of an inch. Just driving empty/not towing and easy driving so hard to say what it would do if it had a load behind it for oil consumption. So far very impressed with the very minimal oil usage. 
    • BIGBOYS
      Doors lock and mirrors fold in while driving

      By BIGBOYS · Posted

      I have a 2015 Silverado and sometimes I can not get in to the truck. I use the key to unlock the driver door. Something is locking the truck when I unlock it, last night I left the truck open and this morning it was locked with the mirrors folded in. This happens while driving so it is now a safety issue. I reach down for the folding button and they open, then they close again.  Any advice, thank you,   Ed
    • Paul8556
      Headlight issue...

      By Paul8556 · Posted

      Did you ever find a resolution to this? my 2019 Silverado 1500 is showing the exact same headlights issues with the exact same symptoms.  would help a ton if anyone has any advice on this or better yet a known solution..
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Wawa and Meijer here have ethanol free (88 & 89) I use for my mower and lawn equipment.  Its not much more than reg.  I paid $3.29 a few weeks ago.  
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      tl; dr I've now reached the 6th floor of hell. I'm chronicling my journey for my morning readers.   Pulling the top of the intake apart was moderately easy but it involved a lot of parts, connections, and minutae. I was preparing for the new fuel lines to arrive ("nut and bolt kit" it's called). The fuel line connections are notched and held in place by the manifold and a metal plate with a T27 screw.   It's on the back of the intake, under the firewall, with little clearance, and two hard metal fuel lines in the way. I was using Franken-tools (weird combinations of 1/4 inch ratchet with/without an extension, with a bit holder for my T27) to get in there. One of my sockets and bits fell off and has yet to emerge on the floor. I lost a second setup and that's when I almost started throwing tools. But that was the point at which I had gotten traction on the Torx head, and it promptly stripped. No more traction.   I started humming "1-877-kars-4-kids" because I was about at that point. You know what? I'm $1500 into this thing and I can make it disappear just as quickly. This isn't fun anymore. I had spent a lot of time already "tidying" around the engine bay: Fixing all the "someone's been here before!" BS. The truck has been exclusively dealer- and shop- serviced and I'm reminded of why I never let other people work on my cars unless absolutely necessary.   Speaking of dealer service. This truck has a 1" stack of records going back to 1995. I put them all in an excel spreadsheet, date/mileage/description.   The CPI spider has been replaced 4 times in 85k miles. The EGR? Another 4. Multiple, multiple O2 sensors. One Cat. 4? Sets of plugs and wires, and I swear half the stack is diagnosis paperwork for "misfire, runs rough, extended crank, dies at stoplights".   GM was producing some proper crap back then. And it was still well within the era of brittle/crappy plastic. (Windows 95 was released the same month this truck was sold new, we HAD the technology!!)   There (was) a plastic shroud around the evaporator core and HVAC fan in the engine bay. I noticed a chunk of it missing so I poked at it some more and it literally shattered. Touched it some more and pieces were crumbling off. Had a good laugh. Clearly whatever plastic garbage they were using had broken down over 30 years and was literally turning to dust. That was a good half hour of using a shop vac to remove the rest of it.   Back to it.   I was going to give up for the evening but then decided I'm already level 10 pissed off at the stripped screw: G* D* it, give me my tools back -- and my JOY. We'll do this the hard way: The whole intake is coming off.   Blazer won Round II. After finally finding and accessing the 12 intake bolts and using a pry bar to unseat it from the heads, it popped loose in an explosion of gunk and grime raining down into open ports. Awesome.   6 times I reminded myself: Be careful of the temperature sender on the front of the intake.   YEAH, I forgot again and snapped it clean off in the removal. Add another $20 to the ever-growing list of new parts this thing is consuming.   The shame is, long before removing the intake, I had changed the oil in prep for Tuesday's momentous fuel line replacement that was going to be the magic fix and I'd have a running Blazer to tool around in this next weekend. The intake removal, including raining gunk, also gushed dirty coolant all over the valley. Of course it did. Welp, there goes another $35.   I now need an intake gasket set, bolt set, coolant temp sensor, another 5 quarts of oil, some RTV. Don't worry, I've already got 3 new jugs of Dexcool and a thermostat waiting. I'll fill it with clean water first to get it running, dump it, and then add the Dex later on in case... well, let's not go there. I'm only tearing this down once, next time the truck is going on Marketplace for FREE.   Oh, and I'm going to need vacuum hose for all the stupid connections placed at the rear of the engine which have since disintegrated. Come on, GM....tell me you don't do that anymore?   Oh, and the ears on the distributor where the cap screws down are both cracked. I mean, why not put a new distributor in it too. You get a distributor, YOU get a distributor, Everyone gets a new distributor!   This truck isn't out of the woods yet...I'm already questioning how much more time I'm willing to sink in.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...