Car Fix DIY Videos

These step-by-step instructions and video detail a thermostat housing unit replacement on a 2003 Chevy Avalanche 1500, but will be similar for a lot of GMC Sierra models. These replacement instructions will also be similar for Chevy Silverado 1500, 2500, and 3500 models from 1999, 2000, 2001, 2002, and 2003, as well as GMC Sierra 1500, 2500, and 3500 models between 1999 and 2003 equipped with a 5.3L Vortec engine. Replacing failing thermostats and cooling system components helps you maintain a safe and functioning cooling system, and can prevent permanent damage to your truck’s engine due to overheating. If you notice that your Vortec takes a long time to heat up or does not heat up at all, overheats, if the heater fails to produce heat, or if you see a coolant leak, it is important to replace the thermostat and thermostat housing as soon as possible.

Supplies Needed for This Job:
1. Safety Glasses: https://urlzs.com/hbwc
2. Gloves: https://bit.ly/2GvfwAm
3. Thermostat: http://bit.ly/2OZaiRX
4. Coolant: http://bit.ly/2IWlyvD
5. Drain Pan: http://bit.ly/2GEzWqK
6. Ratchet and Sockets: http://bit.ly/2IEAOOi
7. Shop Towels: http://bit.ly/2GDgwm1

Facebook: https://www.facebook.com/oreillyautoparts/
Instagram: https://www.instagram.com/oreillyautoparts/
Twitter: https://twitter.com/oreillyauto

Find your local O’Reilly Auto Parts: https://www.oreillyauto.com/locations

Check out Saab Kyles Favorite Garage Supplies: https://urlzs.com/jg78

Shop all your automotive needs: https://www.oreillyauto.com/

Subscribe and ring the notification bell! http://bit.ly/2bTyluF

On our channel we cover several different topics:
Automotive Product Overviews
Do It Yourself Automotive Repair
DIY Auto Maintenance
Simple Automotive Diagnostics
Automotive and Vehicle Education Videos

O’Reilly Auto Parts is an auto parts retailer that provides automotive aftermarket parts, tools, supplies, equipment, and accessories in the United States serving both the professional service providers and do-it-yourself customers. From our roots as a single store in 1957 to our current size of 5,219 locations (and growing), we’ve come a long way. We pride ourselves on offering well researched, and reliable automotive information on our channel.

#OReillyPowered #CarRepair
#TeamOReilly #CarMaintenance

Your Chevrolet Avalanche 1500 or GMC Sierra’s thermostat housing sends coolant back to the radiator, and also stores the thermostat, which controls the flow of coolant to regulate its temperature. Replacing a failing thermostat and thermostat housing on your 2002-2003 Chevrolet Avalanche or other 5.3-Liter Vortec-equipped GM vehicle can improve your truck’s performance and may help keep high temperatures from damaging your engine’s internal components. Thermostats can stick in the open or closed position, allowing coolant to always flow or restricting coolant from moving at all. If your Chevy Avalanche 1500’s thermostat housing or thermostat is failing, the engine may heat up slowly or not reach operating temperature at all, your vehicle may overheat, or you may notice a puddle of coolant beneath your truck if the thermostat housing or gasket has failed. It’s recommended that you replace a failing thermostat and thermostat housing on your 5.3L Vortec to prevent a coolant leak, which could lead to engine damage or seizing. Our detailed instructions will help you perform a thermostat housing and thermostat replacement on your 2002-2003 Chevy Avalanche 1500 or other 5.3L Vortec engines.

Once you’ve got your supplies together, here’s what you’ll do:

Start by parking on a level surface… letting the vehicle cool… and disconnecting the negative battery cable.
Slowly rotate the surge tank fill cap counterclockwise.
Stop rotating and allow the hissing to stop.
After all hissing stops, continue turning counterclockwise to remove the cap.
Put a drain pan in place… and open the petcock.
Allow the system to drain completely.
Close the radiator petcock.

Loosen the air cleaner outlet duct clamps at the throttle body… and mass airflow/intake air temperature sensor.
Remove the radiator inlet hose clip from the outlet duct.
Then remove the air cleaner outlet duct.

Take off the engine cover by loosening the intake manifold sight shield bolt.
Remove the cover from the cover retainer.
Then remove the cover retainer bolts and the retainer, if required.
Detach the radiator vent inlet hose from the radiator hose clips.
Loosen the inlet hose clamp and remove the inlet hose from the water pump.

Remove the two bolts that hold the water pump outlet and thermostat in place, and pull the thermostat from the water pump.
Install the new water pump outlet, which includes the coolant thermostat. Make sure and use the new thermostat O-ring.
Tighten the bolts to 11 foot pounds.

Install the outlet hose and hose clamp on the water pump outlet.

**View full video for complete instructions**