EN
Parts & Tools Parts & Tools
Mechanics Mechanics
Gear Guide Gear Guide
search

Fix Antifreeze Leaks: 1999-2007 GMC Sierra 1500

We are still working to obtain content for your car, however the video above is believed to have similar characteristics as your car.

 
Video Description

The video above shows to how to fix minor coolant (anti freeze) leaks in your 2003 GMC Sierra 1500. Before attempting to fix the coolant components on your Sierra 1500, please check out our What is Leaking? to determine what type of fluid is leaking from your car. Engine coolant (which is also called anti-freeze or antifreeze) circulates through your Sierra 1500's engine and keeps it from overheating. In 2003 Sierra 1500s with the 4.8 liter engine, coolant leaks are most likely to occur where the hoses connect to the engine, but it can also leak from the reservoir or from the hoses. When fixing antifreeze leaks, it is important to check the condition of the hoses - they wear out over time and small cracks are only going to get bigger. The video above shows you where the coolant reservoir, hoses and connections on your 2003 Sierra 1500 WT are located and the steps needed to fix minor coolant leaks.

Coolant is highly toxic, so be sure to wear safety glasses and gloves and always clean up spills promptly as animals are attracted to the sweet taste of coolant. If you ignore a leaking coolant long enough, you will run out of coolant, which leads to overheated engines and other serious, but highly avoidable, problems. In many 2003 Sierra 1500s, a coolant leak can be a precursor to a hose bursting or flying off, which severely limits how far you can drive before your engine overheats.

Other videos you might find helpful

  • Parking Light Change 1999-2007 GMC Sierra 1500
    Change the parking light

    Small bulbs that burn out regularly - did you know you can replace these with LED lights?

    2003 GMC Sierra 1500 WT 4.8L V8
  • Third Brake Light Bulb Change GMC Sierra 1500 (1999-2007)
    Change center stop light

    Don't be the guy with your third brake light burnt out

    2003 GMC Sierra 1500 WT 4.8L V8
  • Brake Light Change 1999-2007 GMC Sierra 1500
    Replace brake lights

    Burnt out brake lights increase your chance of getting rear ended - check and change yours today

    2003 GMC Sierra 1500 WT 4.8L V8
  • Highbeam (Brights) Change: 1999-2007 GMC Sierra 1500
    Replace brights

    On many cars, the high beam bulb runs at reduced power during the day - check 'em and change 'em!

    2003 GMC Sierra 1500 WT 4.8L V8
  • Oil & Filter Change GMC Sierra 1500 (1999-2007)
    Complete oil & filter change

    Sure you can take it in for a $19 lube, but are you OK with a stripped oil pan and cheap parts in return?

    2003 GMC Sierra 1500 WT 4.8L V8
  • Engine Light Is On: 1999-2007 GMC Sierra 1500 - What to Do
    Do not ignore this!

    A check engine light can be cleared with a simple fix or it could be a major problem - find out now!

    2003 GMC Sierra 1500 WT 4.8L V8
  • See all videos for the 2003 GMC Sierra 1500
Comments
The Right Parts
The Right Tools