GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.2L 🢒 Engine Noise on Start-Up, but Only Lasting a Few Seconds

Cause

Correction

Incorrect oil filter without anti-drainback feature

Install the correct oil filter.

Incorrect oil viscosity
  1. Drain the oil.
  2. Install the correct viscosity oil.

Worn crankshaft thrust bearing
    • Inspect the thrust bearing and crankshaft.
    • Repair or replace as required.

Damaged or faulty oil filter by-pass valve
    • Inspect the oil filter by-pass valve for proper operation.
    • Repair or replace as required.