brtzworld Posted August 6, 2019 Share Posted August 6, 2019 Looking for info on the duramax option. First thing is where is and what is the capacity of the DEF tank. Quote Link to comment Share on other sites More sharing options...
gone_fishing Posted August 6, 2019 Share Posted August 6, 2019 Appears to be 5.3 gallons. Fill is next to the fuel filler (behind the fuel door). I found the 2020 3.0 Duramax supplement manual on Chevrolet's website: https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manuals/2020/chevrolet/multimodel/2020-3.0-duramax-diesel-supplement.pdf Quote Link to comment Share on other sites More sharing options...
brtzworld Posted August 6, 2019 Author Share Posted August 6, 2019 Thanks for that, it looks like I have my evenings reading. 1 Quote Link to comment Share on other sites More sharing options...
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