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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 956 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSCOOLANT HEATER REPLACEMENTINSTALLATION PROCEDURE
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Installation Procedure
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Installation Procedure
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Apply GM P/N United States 12346004, GM P/N Canada 10953480 or equivalent to the coolant heater seal and the coolant heater hole.
- Ensure that the coolant heater element is horizontal and pointed toward the front of the engine.
The 3 o'clock position (2) is DESIRED.
The 2 o'clock position (1) and the 4 o'clock position (3) are acceptable.
- Install the coolant heater.NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
- Install the coolant heater bolt.
Tighten
Tighten the bolt to 2 N.m (18 lb. in).
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.