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2017 Silverado 1500 engine temp fluctuating *new 5.3l owner*

Rene Celaya

By Rene Celaya
in Troubleshooting & Recalls

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Rene Celaya New Member

Rene Celaya

Posted
Posted

I have a 2017 Silverado 1500 5.3L crew cab 4WD. Just purchased Nov 17 and has about 500 miles on it. I live in phoenix Arizona and took it up north to payson last weekend. The freeway goes through some mountains so a lot of ups and downs. Not towing anything just 2 adults and 2 kids in the truck.

 

I noticed my engine temp go up when I try to maintain speed and then go back down to 210 deg when I let off the gas. When I passed a vehicle I got on the gas and going on an incline and the needle went up (see picture). When we got back to phoenix I put it in manual shifting ran it about 3k RPM's and the needle will start moving up.

post-165759-0-90056800-1480360632_thumb.jpg

 

My last truck was a 2005 duramax and the engine temp would always stay around 210 unloaded. When I would pull our trailer close to 8k lbs heavy on this route then engine temp would move and transmission temp would move as well but it was expected.

 

Since this is my first 5.3l gas engine are they designed to run that way? is there a certain limit that it reaches then the fans would turn on to cool it?

My concern is we go camping in payson and heading up there unloaded this is happening, If I would tow a camper or a trailer would this be the expected engine temp or now that im loaded up would it overheat?

 

I haven't taken it to the dealer yet but I want to make sure its a problem before I take it and waste anyone's time. Mainly I don't want to take it to the dealer and they tell me they can't find anything and next time im heading up north to go camping it overheats and ruins the trip.

 

If you guys can help I would greatly appreciate it. I don't have a digital gauge just the analog gauge. also if any of you don't mind running your truck at 3k rpms and see if it starts to warm up. If not I might have to "test" drive a new Silverado and try it out.

 

Thanks

 

 

post-165759-0-90056800-1480360632_thumb.jpg

post-165759-0-90056800-1480360632_thumb.jpg

post-165759-0-90056800-1480360632_thumb.jpg

newdude Senior Enthusiast

newdude

Posted
Posted

Might want to take that in asap. Maybe even see if you can take a tech for an extended drive to duplicate it. I wonder if those grille shutters in front have something to do with that (if they are staying more closed for aero purposes and not providing cooling. I'm in NY and many of the trucks I've driven in on a hot a$$ summer day sit at 210 and don't budge up or down.

Rene Celaya New Member

Rene Celaya

Posted
  • Author
Posted

So took my truck in for service and I was told that it is normal. I guess the new 2017 Silverado's have Active aero shutters in the front to improve MPG. So when I give it gas the shutters close to minimize drag.... Not sure if I like this answer but I think im going to hook up my go pro under the hood to see it in action.

  • 1 year later...
FastStarrCountyL83 Enthusiast

FastStarrCountyL83

Posted
Posted

I got a 18 4x4 super crew and it does the same thing, if they hit a certain temperature now days they shut off completely and kill the engine to protect it from any damage. It was alarming at first to me also but considering the shutters and purpose etc it makes sense.

Nasty Senior Enthusiast

Nasty

Posted
Posted
5 minutes ago, FastStarrCountyL83 said:

I got a 18 4x4 super crew and it does the same thing, if they hit a certain temperature now days they shut off completely and kill the engine to protect it from any damage. It was alarming at first to me also but considering the shutters and purpose etc it makes sense.

Take it in.  I beat the shit out of my truck. And its never gone past 210

Loco-diablo Senior Enthusiast

Loco-diablo

Posted
Posted
On 9/30/2018 at 1:41 PM, Nasty said:

Take it in.  I beat the shit out of my truck. And its never gone past 210

He did bring it in.. they explanation was the shutters introduced in 2017. I guess a small temp fluctuation is acceptable with the shutters opening and closing.

Nasty Senior Enthusiast

Nasty

Posted
Posted
16 minutes ago, Loco-diablo said:

He did bring it in.. they explanation was the shutters introduced in 2017. I guess a small temp fluctuation is acceptable with the shutters opening and closing.

Shutters?

Snox440racer New Member

Snox440racer

Posted
Posted (edited)

My 2017 does the same thing but didn’t start until I hit like 17kmi, and it only happened when I was towing.  I brought it in and GM replaced the stock thermostat.  Now it fluctuates even more, even under normal city/highway driving without any load.  Brought it back and they stated it’s “normal” as the new thermostats are slower opening, due to all the rad issues they’ve had in the past.  

Edited by Snox440racer
Bigmac Enthusiast

Bigmac

Posted
Posted

My 2017 and 2018 6.2 max tow both did it when towing. 2015 5.3 did not get that high towing a smaller trailer.  It goes to certain point then 2nd fan kicks on. All good. 

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