Main Riff(will get whole song soon) e|--------------------------------------------------------------------------| B|--------------------------------------------------------------------------| G|------3-3--------------------5b-3---------------3-3-----------------------| D|-5-5------5-3-5--5-5----3-5---------5-3-5--5-5-------5-3-5---------3------| A|----------------------3-------------------------------------3h4h5----3-1--| E|--------------------------------------------------------------------------| i could not find one single tab for this song on the net but if anyone does know where full tab is i would be thankful to be notified. Here is the main riff at least.
https://primanota.net/grand-funk-railroad/inside-looking-outmain-chords.htm