As a test, you can put the PMD that caused the DTC and see if that is still causing the DTC.
On the other hand, you may not want to disturb anything except probably get a new PMD for spare.
Now, make sure you test it in the truck driving for a few weeks before retiring it as a WORKING spare.
1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Last edited by JMJNet; 05-11-2019 at 04:07 PM.