Aloha, recently bought my first 12v and first diesel truck for a work truck towing etc. (Fleese hx35, no cat aftermarket exaust, otherwise stock 12v) I got it cheap cause it's underpowered and have been chasing down the problem. The way I understand it's likely turbo or fuel pressure. I've...

I have bought a Fass 165 Titanium Signature series pump that came off a duramax. Bought the correct fittings to hook it up to my truck and also installed a sump. Pump flows good into a bucket, getting good fuel flow without air and such. But when I hooked up a electronic pressure gauge through...

Can someone please tell me how to test my transmission? I bought a new pressure testor from Harbor Freight. Now what?

Does anyone know where the valve to depressurize the fuel system is on the 1998.5 - 1999 trucks? I'm trying to install a fuel pressure gauge there.