94 gmc diesel 6.5 turbo

[MPVman]

Originally Posted by ivykrewe

MPVman, my daughter has 95 Suburban with 6.5. It will die then restart and may run for months or sometimes hours before it happens again. Do you have any ideas what to check?

Yes that sounds like a PMD Failure, There are several kits online that will allow you to Move a new one away from the heat where the factory one is, Heat is the Number 1 killer of PMD's and the problem you described point to that

[FamFun4 u]

Got the problem fixed. Got a heat seat for the unit and found out the oil pressure sending unit was bad. It Was reading 25-30 psi at idle. The new one reads a steady 35-40. Read the the sending unit sends a signal to the box. Truck runs like a champ now. Thank you everyone for the help.