I HAVE A 95 GMC Z-71 WITH A 6.5 TURBO DIESEL . I RECENTLY REPLACED THE PMD WITH A COOLING UNIT TO START . THEN THE OIL PRESSURE SWITCH AND THE LIFT PUMP .CLEANED THE K/N AIR FILTER AND RE-OILED IT . THE TRUCK RAN GREAT AT FIRST(FOR ABOUT AN HOUR TOTAL) BUT WILL NOT RUN ANYMORE . THERE IS FUEL COMING OUT OF THE T HANDLE AND OUT OF THE TOP OF THE FUEL FILTER WHEN I CHECK FOR PRIME . THE MOTOR TURNS OVER GREAT BUT WILL NOT FIRE . I CHECKED FUSES HOSES AND CONNECTIONS RESET THE ECM THROUGH PULLING THE FUSE BUT NOTHING HAPPENS .I CAN HEAR THE LIFT PUMP WORKING ALSO . THE BATTERIES WERE DISCONNECTED WHEN I REPLACED THESE PARTS SO EVERYTHING SHOULD OF BEEN SAFE . IM LOST , I HOPE SOMEONE CAN HELP.

 

hmmmm. Bad connection on your PMD maybe? Only thing I can think of without tearing ish apart

 

I'm not too familiar with the 6.5, but crack an injector line to see of there is fuel coming out when it turns over. If not, you got a bad injector pump or the kill solenoid went out.

 

Since no updates in a long time, I'm going to assume this is a fixed problem and am closing the thread. If need be, this thread can be reopened.