Dex-Cool

[WarWagon]

Nice Mike. I still cannot believe that GM did not put a petcock valve on these. When you drained, did you take off the fill reservoir cap?

My 2005 has a drain on the radiator by the lower hose. Removing the cap helps it drain faster.

 

[THEFERMANATOR]

My 2005 has a drain on the radiator by the lower hose. Removing the cap helps it drain faster.

I believe GM did away with it in 06 when they went to the larger radiator. And the ones with a drain go all over the frame as it runs down all over the core support and frame rail unless you drill a hole for it to run through.

 

[tanman_2006]

I could have sworn my 06 had a drain... Wouldnt be the first time I was wrong though.