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 352 (ENGINE COOLING SYSTEM)REMOVAL AND INSTALLATIONDRAINING THE COOLING SYSTEM
1999 GMC Forward Control 5.7 R, Automatic
Draining The Cooling System
1999 GMC Forward Control 5.7 R, AutomaticSECTION Draining The Cooling System
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
DO NOT ATTEMPT TO OPEN COOLANT CAP WHILE COOLING SYSTEM IS UNDER PRESSURE.
- Remove coolant cap from surge tank.
IMPORTANT: A-7.6 liter (8 qt.) coolant container will be needed.
- Place coolant container under radiator drain valve located at the bottom of the right radiator end tank.
- Using a flat bladed screwdriver, open drain valve and drain coolant.
- If engine block needs to be drained, a drain valve is located at the bottom of the water pump assembly.
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.