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 MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSCOOLANT HEATER REPLACEMENT (4.3L ENGINE)REMOVAL PROCEDURE
2001 Chevrolet Suburban C1500
Removal Procedure
2001 Chevrolet Suburban C1500SECTION Removal Procedure
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Drain the cooling system. Refer to Draining & Filling Cooling System .
- Disconnect the heater cord from the coolant heater (4).
- Loosen the bolt retaining the coolant heater to the block.
- Remove the coolant heater from the engine block.
- Do not score the machined surface of the hole.
- Grasp the plug with pliers.
- Pull the plug from the engine block.
- Clean the core plug hole in order to remove the following substances:
- Burrs
- Compound
- Paint
- Rough spots
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.