Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.3 T, 4L60E/M30REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1450 (ENGINE MECHANICAL - 4.8L, 5.3L, 6.0L OR 6.2L (2 OF 5))ON-VEHICLE REPAIR INSTRUCTIONS (1 OF 2)ENGINE BLOCK VALLEY COVER REPLACEMENTINSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30

Installation Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30SECTION Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: All gasket surfaces should be free of oil or other foreign material during assembly.

Fig 1: View Of Oil Pressure Sensor & Washer

Courtesy of GENERAL MOTORS CORP.

Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the oil pressure sensor.

NOTE: Refer to Fastener Notice .

Install a NEW washer (707) and the oil pressure sensor (706).
Tighten: Tighten the sensor to 35 N.m (26 lb ft).

Fig 2: View Of Engine Valley Cover & Gasket

Courtesy of GENERAL MOTORS CORP.

Lubricate the O-ring seals with clean engine oil.
Install the O-ring seals (537) to the cover.
Set the engine valley cover (555) onto the engine.
Install the engine valley cover bolts (506).
Tighten: Tighten the bolts to 25 N.m (18 lb ft).
Install the intake manifold. Refer to Intake Manifold Replacement (RPOs LY2/LY6) or Intake Manifold Replacement (RPOs LC9/LMG/LY5/L76) or Intake Manifold Replacement (RPO L92 - First Design) or Intake Manifold Replacement (RPO L92 - Second Design) .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.