Loosing Coolant

[fireaxxe]

I noticed at 20k the coolant was below the cold fill mark about 3/4" when cold. Filled it back up with distilled H2O. I now have 33K and the coolant is about an inch below the cold fill mark when cold. I investigated to find a slight odor near the top corner of the radiator on the drivers side. I looked closer and noticed that the metal tabs are cracked in this area. I can not see a physical leak yet but can tell its leaking a bit faster. Off to the dealership AGAIN! Problem # I lost count.

Edited December 26, 2015 by fireaxxe

[tbarn]

There is a tsb for that very concern. Needs a radiator and thermostat. Thermostat cycles too much causing stress cracks in the radiator.

[WLC]

Wow! I check mine. How widespread is this?

[WLC]

Checked mine 1is broke and one truck is fine.No known coolant leaks. How long will this be covered by warranty?

[wacko]

Both tabs on mine are broke... Any info on the TSB?

[pm26]

Sometimes radiators with plastic tanks develop microscopic cracks that will cause slow coolant leaks, but you will not see the crack with a naked eye. I had a crack like that on the upper hose neck on my Mazda 626 radiator. It happened after 200k miles, and I could see a drop of coolant oozing from the invisible crack. I was loosing about a quart of coolant per month this way.

[SAKO79]

For the last month I've been getting cool and smell from the front of my engine with the hood closed when I'm at a drive thru it's a very noticeable the smell just sitting and idling dealer says that no leak I wonder what this Technical Service Bulletin is myself anyone have a link to the bulletin

[SAKO79]

I just checked mine the driver side is cracked I looked and shined a flashlight on the passenger side its not cracked but the top of the rad in the core is all wet and leaking

[fireaxxe]

Here is a link to a possible wide spread issue.

 

http://oemdtc.com/25613/coolant-smell-andor-slight-leak-at-radiator-2014-2015-cadillac-chevrolet-gmc-vehicles

 

 

Also I checked the part numbers to see what I could expect when it comes to availability of a radiator, just in case I needed to replace mine. I can not find my part number and there are only two others that I can find. It seems as if GM already has a new part number for the replacement radiator.

 

My Current Radiator part #23431774

 

*New W/O Max Tow package Replacement part #23445967*

 

** Possible New W/Max Tow package Replacement part #23126402**

 

(Not sure if the Max Tow Radiator part number was changed as I have nothing to compare it to. Is there anyone with the Max Tow Package that can confirm this?)

 

This number is located on the upper corner of the radiator on the passenger side.

Edited December 28, 2015 by fireaxxe

[fondupot]

Gonna have to investigate on my truck.

[SAKO79]

I just got off the phone with my dealership they looked on my VIN and there is a special repair notice attached to it for this issue I haven't booked in on Thursday and they're giving me a rental truck until it's fixed they also told me there is a fuel sensor that has to be replaced

[chuckl1218]

I just got off the phone with my dealership they looked on my VIN and there is a special repair notice attached to it for this issue I haven't booked in on Thursday and they're giving me a rental truck until it's fixed they also told me there is a fuel sensor that has to be replaced

What year and model is your truck?

[SAKO79]

2014 gmc sierra 1500 sle crewcab 5.3l

[WLC]

My crew cab is cracked and double cab is not cracked. Wonder if this is a trend?

[pbergmann]

When will this insanity stop?????? For the next one....Tundra here I come!!!