Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!
np261
1-1 of 1 Results
Advanced
  1. 01-04.5 LB7 Duramax Powertrain
    I am trying to troubleshoot a miss in my 2003 GMC Sierra 2500HD LB7 ZF6 NP261. It has an intermittent problem at lower and higher constant speeds where it will hesitate and you can hear the clutch unload/reload. The motor was completely rebuilt 20,000KM ago. The injectors are 50,000km old and...
    lb7 missfire np261 zf6
1-1 of 1 Results
Top