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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 667 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSRADIATOR HOSE REPLACEMENT - OUTLET (3.1 L)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic
Removal Procedure
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Drain the cooling system. Refer to Draining and Filling Cooling System .
- Use J 38185 in order to reposition the hose clamp from the water pump housing.
- Remove the radiator outlet hose (3) from the water pump housing (1).
- Raise and support the vehicle. Refer to LIFTING & JACKING THE VEHICLE .
- Remove the lower air deflector. Refer to Radiator Air Baffle and Deflector Replacement - Lower .
- Use J 38185 in order to reposition the hose clamp from the radiator.
- Remove the outlet hose from the radiator.
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.