Problem Reports

GMC 3500 Pickup

Report: Check Engine Light Due to Gas Cap Issue

• Check Engine Light and Misfire Due to Stuck Fuel Injectors
  One or more fuel injectors may become stuck closed causing an engine misfire  and the Check Engine Light to illumina...

  Common Problems > GMC 3500 Pickup

• Worn Valve Seats May Cause Engine Misfire
  The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engin...

  Common Problems > GMC 3500 Pickup

• Internal Faults in Distributor Can Cause Engine Problems
  The distributor may develop internal faults. This can cause a rough running engine or stalling...

  Common Problems > GMC 3500 Pickup

• Check Engine Light With Code P1870
  Vehicles equipped whit a 4 speed automatic transmission may develop a harsh 1-2 shift and/or il...

  Common Problems > GMC 3500 Pickup

• Intake Manifold Gaskets May Leak Coolant or Engine Oil
  The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...

  Common Problems > GMC 3500 Pickup