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1990 DeVille
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181 Posts
Discussion Starter #1
This 1990 has only 21,xxx miles on it, and the coolant is bright green. I wish to change the fluid, flush the system, fill with distilled+coolant, and add some tabs.

Is there a published step-by-step procedure for this system? If not, who has done it and would be willing to write it up?

Thanks!
 

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'87 Coupe DeVille 4.1L FWD(New engine '08) 1981 F100 '03FXDL
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879 Posts
I installed a Prestone flush-kit so I can back-flush my engine every 2 yrs. All my vehicles have the kit installed. The flushing procedure has already been written up. Look at the 'tags' below the post>click. There are many Cadillac Factory Service Manuals available on ebay, starting at $9.95........
 
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