![]() ![]() They have had very good results with this repair. Also add an anti-electrolysis solution to it and a radiator cap with an anode rod on it. The radiator shop said the only repair is to flush out the cooling system for 36 hours the refill it with antifreeze, not dex-cool. This is the main cause of my problem and gm and the dealer will not address it. I found out from a radiator repair shop that they have had many gm cooling system failures du to the dex-cool causing electrolysis. I filed a complaint with GMC (complaint # 1-152407734) GMC could not help me. ![]() The dealer could not tell me why the dex-cool was gelling up or the heater core kept leaking. All these repairs where done by gm dealer. ![]() ![]() The cooling system had to be acid flushed by the dealer because the dex-cool gelled up. Each time the heater core had to be replaced. The radiator had a leak ( 34391 miles), the cooling system clogged up and the heater core leaked from dex-cool gelling up ( 65265 miles ), again heater core leaking from bad dex-cool ( 104044 miles ), heater core leaking (114387 miles). From the time I bought the car the cooling system had trouble. I will go to another make of car-thank you for your time.ĩ7 Blazer cooling system failure. I paid the cost, but after purchasing gm products for the past 30 years, if I am faced with additional cost of an apparent defect by the manufacturer. Was told by dealership that nothing I could really do to maintain, just keep check on coolant level every oil change, and system could fail again at any time-no guaranteee and the dealership also argued with gm rep-that there is a problem with dex-cool antifreeze. Spoke with the gm dealership who argued my case, asked what maintainence required on my part, since the dex-cool maint schedule is 155k miles, maint free-my vehicle has 70k miles and second flush in 12 mo period. Was told by gm rep that the coolant system is a maintainence item and they could not assist or accept responsibility in the reapair cost. Paid $212 for the flush today and filed complaint w/ gm due to the obvious problem which they deny with dex-cool ( 8 states have class-action suits). One year later vehicle over-heating again, no longer under ext warranty. Problem with the dex-cool system in my 2000 chev Blazer-heater went out July 2004, was under extended warranty and heater core replaced, radiator was flushed at the same time. Last f & f done 08-30-2009 and vehicle is starting to run hot already/again. All other regular maint done when required. There are no visible leaks on the ground or on the block. Engine temp will be good for the first few weeks after a f & f then begins to run hot again with the smell of coolant in and around the vehicle. I have replaced two water pumps, three thermostats and have spent hundreds of dollars just doing flush and fills. Dex-cool has left so much sludge throughout the system I can't get it all out and it continues to plug the system. Every year since, when colder weather sets in, the same problem shows up and I go through the same flush and fill procedure. After about 10,000 miles began to loose heat again, repeated flush and fill. Drained, back flushed heater core and flushed system 3 times then added prestone (green) coolant. I noticed a crystal-like residue floating in coolant. When vehicle reached 100,000 miles, I began to loose heat. Gm states dex-cool is maint free to 155,000 miles. Had dex-cool in system which I monitored regularly to make sure has topped up. I have a 2000 Blazer lt with 128,000 miles that has had heating/cooling system problems for several years. ![]()
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