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 1569 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSSURGE TANK REPLACEMENTINSTALLATION PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Install the surge tank.
NOTE: Refer to FASTENER NOTICE .
Install the bolt to the surge tank.
Tighten

Tighten the bolt to 9 N.m (80 lb in).
Install the nut to the surge tank.
Tighten

Tighten the nut to 9 N.m (80 lb in).

Fig 1: Install Surge Tank, Bolt & Nut
Courtesy of GENERAL MOTORS CORP.
Install the surge tank outlet hose (2) to the surge tank.
Position the surge tank outlet hose clamp to the surge tank.

Fig 2: Install Surge Tank Outlet Hose
Courtesy of GENERAL MOTORS CORP.
Install the surge tank inlet hose (1) to the surge tank.
Position the surge tank inlet hose clamp to the surge tank.

Fig 3: Install Surge Tank Inlet Hose
Courtesy of GENERAL MOTORS CORP.
Connect the coolant level sensor electrical connector (3).

Fig 4: Connect Coolant Level Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Install the surge tank overflow hose.
Install the air cleaner assembly. Refer to AIR CLEANER ASSEMBLY .
Fill the cooling system. Refer to Draining and Filling Cooling System .

Fig 5: Install Surge Tank Overflow Hose
Courtesy of GENERAL MOTORS CORP.

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.