There is a facebook group called TITS and ASS of towing. I am a member and there is a lot of information available. Look it up and contact the admins. Here are a few pics. Some are clearly at the foot valve on the firewall (note there are different colors used on different trucks) some are under cab- some are at the realy at the rear axles. On the trucks you tow regularly it becomes easier and easier- on some trucks it is a matter of trial and error. But after hauling loaded trash trucks, cement mixers, dumps, etc. and feeling the difference- I am a firm believer in taking the time. Just be sure to ALWAYS reconnect any lines disconnected. Sent from my LGMP450 using Tapatalk
