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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1896 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER OUTLET REPLACEMENT

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Water Outlet Replacement

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Water Outlet Replacement

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Water Outlet Housing

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedures Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement (LY7) or Radiator Inlet Hose Replacement (LZ4) or Radiator Inlet Hose Replacement (LAT) or Radiator Inlet Hose Replacement (LE5) or Radiator Inlet Hose Replacement (HP5) . Remove the right engine mounting bracket. Refer to Engine Mount Bracket Replacement - Right Side .
1	Water Outlet Housing Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure: Remove the water outlet housing bolts. Tighten: 10 N.m (89 lb in)
2	Water Outlet Housing
3	Seal Procedure Remove the water outlet housing seal. Discard the seal. Install a new water outlet housing seal.

RENDER: 1.0x

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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.