I assume they replace the coolant with new at the Chevrolet dealer so my coolant probably is 7 years. Although I don’t have the original battery coolant, it was replaced in 2012 when I had my (im)famous battery retrofit campaign. The Dex-Cool expose' like the one posted above is pure hysteria. Besides, mixing dexcool and universal antifreeze reduces the coolant integrity and can damage the different components of the coolant system of your GM vehicle. My 2011 Volt is now 8 1/2 years old with 125,000 miles. internals were clean, and it had been filled with Dex-Cool for 4 years. The block was hot tanked, and had no residue resembling 'manure'.

My engine (vehicle purchased new by me) was totally torn down for the stroker rebuild at the age of 6 years, with 65,000 miles on it. Ive done this for the past 22 years with my truck and cars. I addition, I use a test strip to make sure the coolant is up to parr. It just takes a gallon of DexCool and a Gallon of distilled water (mix before you add). In 24 years of owning and working on and with the LT1 engine, I have never seen an engine that looked anything at all like the one in your picture. Compatible with other hybrid gold antifreeze/coolant formulations Service life of up to 5 years/150,000 miles with a complete cooling system flush and fill. I drain my radiator each year and replace with fresh DexCool.

When problems do occur, it is often due to poor cooling system maintenance, mixing of non-compatible products, and excessive air entrainment - failure to bleed air from the system or running low on coolant for extended periods of time. If it produced problems like that, there would be abandoned, overheated, radiator clogged GM vehicles littered everywhere. Easiest thing for you is probably to just keep using the Dex unless you have some sort of problems come. The main thing is to flush the system so there’s no cross-contamination of coolant types. GM has used Dex-Cool in MILLIONS of vehicles over a period of 20+ years. I can’t speak for late model GM vehicles but my ’98 S-10 says to only use Dexcool but I’ve been using regular green coolant just fine for years.

Gm dexcool coolant system flush