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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> Engine Noise Under Load

Engine Noise Under Load

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
Cause Correction
Low oil pressure
  1. Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing .
  2. Repair or replace, as required.
Detonation or spark knock Verify the correct operation of the ignition controls. Refer to Symptoms - Engine Mechanical .
Loose torque converter bolts
  1. Inspect the torque converter bolts and flex plate.
  2. Repair, as required.
Cracked flex plate - automatic transmission
  1. Inspect the flex plate bolts and flex plate.
  2. Repair, as required.
Excessive connecting rod bearing clearance Inspect the following components and repair, as required:
  • The connecting rod bearings
  • The connecting rods
  • The crankshaft
Excessive crankshaft bearing clearance Inspect the following components and repair, as required:
  • The crankshaft bearings
  • The crankshaft journals
  • The cylinder block crankshaft bearing bore
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