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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Mechanical - 2.8L (LWN) Diesel) >> Diagnostic Information and Procedures >> Engine Will Not Crank - Crankshaft Will Not Rotate

Engine Will Not Crank - Crankshaft Will Not Rotate

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Cause Correction
Seized accessory drive system component
  1. Remove accessory drive belt(s).
  2. Remove the glow plugs.
  3. Rotate crankshaft by hand at the balancer.
Hydraulically locked cylinder
  • Coolant/antifreeze in cylinder
  • Oil in cylinder
  • Fuel in cylinder
  1. Inspect for fluid at glow plug hole.
  2. Inspect for broken head gasket(s).
  3. Inspect for cracked engine block or cylinder head.
  4. Inspect for a sticking fuel injector.
Seized automatic transmission torque converter
  1. Remove the engine assembly. The torque converter bolts are not accessible with the engine installed to the transmission.
  2. Rotate crankshaft by hand at the balancer or flywheel location.
Seized manual transmission
  1. Disengage the clutch.
  2. Rotate crankshaft by hand at the balancer.
Material in cylinder:
  • Broken valve
  • Piston material
  • Foreign material
  1. Inspect cylinder for damaged components and/or foreign materials.
  2. Repair or replace as required.
Seized crankshaft or connecting rod bearings
  1. Inspect crankshaft and connecting rod bearings.
  2. Repair as required.
Bent or broken connecting rod
  1. Inspect connecting rods.
  2. Repair as required.
Broken crankshaft
  1. Inspect crankshaft.
  2. Repair as required.
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