1.5/5 (78 reviews)

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DexCool Reviews

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Page 1 Reviews 0 - 10
Verified Reviewer
Original review: Jan. 28, 2019

In 2017 I purchased used a 2009 GMC Sierra 1500 pick up truck for $17,000.00. I loved my new truck up until about a year after purchase. It started overheating so I took it to the dealer. I was told it was low on coolant so they topped it off, did a pressure test and told me everything was fine. 4 months later it’s overheating again. Now I have to add a gallon of coolant about every month to the reservoir or it will overheat. If anyone knows how I can join the DexCool class action lawsuit please let me know. I’m very disappointed with my purchase now as I was completely unaware of the problems with DexCool and that my vehicle used it. I don’t make a lot of money so I cannot afford excessive repair bills due to a product that GM says is a good product when it is obviously causing major issues and repairs.

8 people found this review helpful
Verified Reviewer
Original review: Sept. 19, 2018

I was surprised when I went to the auto store and the lady told me that they are not a lot to suggest any other coolant for most GMs other than DexCool even if they know you can use good old green coolant in your car as long as they're not mixed with DexKill and a good flush before switching. DexCool can pay the bill for all their haters but not on Consumer Affairs! I switch to green after replacing heads and intake gaskets at 150k on my 99 Malibu 3.1. NP since. Bye DexCool!

9 people found this review helpful

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    Verified Reviewer
    Original review: Dec. 30, 2017

    Recently replaced coolant, DexCool in my 2003 GMC 1500 Sierra 4.8, 2wd. No sludge. Color was still pretty good. I tested the heat and coolant resistant on the stuff I was replacing on the way out, and it was way above requirements. I did not test the ph level with test strips so I do not know that. I've never had any issues with overheating or any related repairs to the engine. No gaskets, no nothing. I bought the truck used with 59,000 miles from one female owner who took great care of the vehicle. I now have 181,000 miles. I live in the mountains, 5,000 ft, of West Texas, 100 miles east of El Paso in the Chihuahua Desert. I drive on lots of dirt/muddy roads, in extreme weather, monsoon rains, 90 to 100 degrees regularly. Very satisfied with what I saw and hold the vehicle held up so far. Will be changing coolant once a year from now on. Heard that if the coolant gets too acidic, it could corrode the aluminum parts in the engine.

    Love the LS engine and this GMC truck. Have a '99 Silverado too, 175,00 miles. Three times I had to drive through flood waters with water over the top of my hood for around 30 seconds or more, 50 to 100 feet, in monsoon rains, and had no damage that caused any failures to my GMC truck. And I have put many thousands of miles on since. Zero issues. Real life miracle to me. So impressed, I'm thinking of putting a snorkel on the truck and do some other things to the electrical to seal. Sorry for the tangent, but wanted to put that info out because it is incredible and true. With regards to the DexCool, no issues, held up great, so I'm going to stick with it, and change it more often.

    8 people found this review helpful
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    Verified Reviewer
    Original review: Oct. 25, 2017

    I have a 2006 Pontiac Gran Prix GT that had DexCool antifreeze in it which is recommended for GM cars. I have heavy pink sludge in water pump, radiator etc. Already have had to replace water pump, thermostat, radiator etc. Why is this used knowing it can destroy vehicles??? Are the lawsuits still going on? These repairs are costing me a lot!! Live on ss and husband passed away just 2 months ago!! How do I afford all this?? Feeling really angry!!

    9 people found this review helpful
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    Verified Reviewer
    Original review: May 7, 2017

    I have bought a 2000 Oldsmobile Intrigue GLS back in 2014, I didn't have any trouble with it until this past Christmas in 2016. I had major leaking from head gaskets and water pump that have damaged my alternator. That repair was 320.00. Now to fix the water pump and head gaskets will cost 6-700.00. I don't have that money right now. I'm leaking oil and coolant. Ugh. I just found out that GM settled this DexCool lawsuit back in 2008 way before I bought this car. Is there a way to get my car fixed through them for free, or low cost since it's more likely from DexCool. I read that water pumps and head gaskets went bad due to DexCool. Any help would be great. Thanks!

    13 people found this review helpful
    Verified Reviewer
    Original review: March 17, 2017

    I have a 2013 Chevrolet Sonic RS. My car has just reached 60 thousand miles. In 2015 the hoses that go to my heater core randomly exploded with no warning of overheating or anything. That was a 300 dollar fix at the dealership because they are not considered a warranty item. In late 2016 my upper heater hose swelled up like a balloon, and then burst, another 150 dollar repair.

    In January of 2017 my coolant overflow tank started to get random pinholes throughout the side and bottom. A part that looks like a thick plastic tank was no match for Dex-Cool, there was another 80 dollars to replace myself. But to top it off, March 2017 as I thought all my coolant issues were resolved I now have a thermostat that has frozen shut, thankfully I was able to fix this myself so it only cost the 30 dollars for the part. I'm just waiting for my radiator to blow next! So thank you Chevrolet for making the worst coolant system I have ever seen. Might I add my 89 Chevy Truck with 210000 miles has never had a coolant issue but doesn't use Dex-cool. I have receipts and shop bills from every purchase, I will gladly share those if and when the time comes.

    10 people found this review helpful
    profile pic of the author
    Original review: Feb. 11, 2017

    I hope I'm not beating a dead horse, but I've never had a coolant leak and way under 150k miles in my 2001 Chevy Silverado. Now from time to time the low coolant light came on and I would just purchase that manufacturers recommended orange Dex-Cool and top it off. I've always lived very close to work and have only taken this truck on a couple of long trips each less than 500 miles in distance.

    That said this week I found a large pool under my truck. Initially I thought it was transmission fluid due to the reddish orange color not realizing it then that tranny fluid is red. Anyhow I'm not looking for keyboard mechanics to tell me I should have done this or that kind of comment but I really need to know was there a legit recall I could use to address this issue or is GM just shrugging their shoulders and saying ** the little guy? Any factual information pertaining to this Dex-Cool crud I was informed to use would be helpful. Thanks again and not looking forward to these repairs.

    6 people found this review helpful
    Verified Reviewer Verified Buyer
    Original review: Dec. 9, 2016

    In 1996, my father, the late Charles **, purchased a 1996 Chevrolet S10 pickup truck with the 4.3 liter v6 motor. Unbeknownst to me, there was a product recall in the year 2008 due to major damages to said engine caused by the "required coolant", DexCool, which was specifically created, supposedly, for GM engines. The reason for the recall was ruined radiators due to weird orange-brown sludge with a rusty appearance that clogged up the vehicle's cooling system, failed head gaskets and other major repairs caused directly by DexCool. My father was one of those people who bordered on being obsessive about following recommended manufacturer's instructions about vehicle maintenance.

    In 2001, my father passed away and I inherited this vehicle. From time to time, it would overheat, then apparently temporarily correct itself. As time progressed, the problem continued to worsen, until the vehicle would severely overheat. Finally, out of desperation, I took it to a mechanic. He replaced the thermostat. That worked for a while, but the problems worsened. A mechanic then suggested I replace the radiator, which I did. This seemed to solve the problem. For a while, it did. After another year or two the problem was back in full force. Now once again after another 3 years I am running into the same issue. The truck overheats and I have to pull off and let it cool down before I continue to travel.

    In 2008, GM offered a settlement for a class-action lawsuit pertaining to the aforementioned damage to affected vehicles. Even this is not satisfactory. The problem continues. As does the damage due to this noxious chemical 'coolant'. Apparently, I am far from the only one with this issue. The case needs to be reopened and offer a real solution to people who have incurred large outlays of cash. These are very expensive repairs. Some people have had to replace their head gasket. I don't know if that's what's in store for me or not. I'm very angry, and I know my father would have been very unhappy as well.

    What can I do, I'm very low on funds. GM should be held completely responsible for their actions and the product that caused all the damages. In addition, in order to dodge payments that were required to settle the lawsuit in 2008, this same company declared bankruptcy in 2009 so as not to have to follow up and remedy the owners' problems. Thank you in advance for any assistance you may be able to render me. I have now replaced 2 radiators and 3 thermostats since obtaining dad's truck. I will never purchase a new GM vehicle, if this is what passes for customer 'service'.

    16 people found this review helpful
    Verified Buyer
    Original review: April 26, 2016

    Same problems with DexCool 4 year old car with less than 14000 miles and coolant is brown instead of red and foul odor inside car. Dealership has same shoe box answer that GM has no problems with Dexcool want me to spend $400 on a new cabin air filter and reprogram car computer so fan runs longer. They also said it might fix problem no guarantees. Why should I have to pay for a reprogram when GM has created the problem. Other forums say the smell comes from heater hoses breaking down on the inside thus causing a foul dead animal smell in car.

    13 people found this review helpful
    Verified Reviewer
    Original review: April 17, 2016

    I have a 2000 Silverado 1500 Z71 with 5.3 L and 165000 miles that I inherited from my brother about 6 years ago. He bought used in 2006, then has regular antifreeze in it. I'm not sure who put the regular antifreeze in it to begin with, since my brother isn't living and I can't ask, but my radiator and engine doesn't have rust or sludge. I can say my truck overheated from a malfunctioning thermostat about 4 1/2 yrs. ago and I replaced the thermostat and added the 50/50 antifreeze. I did not see any rust anywhere. So, as for the DexCool, I don't know, but I do know my brother was a diesel mechanic, so either he removed the DexCool or GM did. Whomever it was did the right thing because I do not have rust or sludge.

    I also have to say I have been a Shadetree mechanic for 30 yrs. and have used distilled water in my radiators for at least 25 yrs., after replacing a radiator and water pump due to rust and failure. Since I started using the distilled water instead of tap water, I have never had rust show up in my radiator water nor have I had to replace a radiator due to clogging. I also only replace my antifreeze every 3 or 4 yrs. So as for old coolant causing problems I think that's crazy.

    10 people found this review helpful
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    DexCool Company Information

    Company Name:
    Chevy Suburban