Question about 2003 Chevrolet Silverado 2500HD

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2003 CHEVROLET SILVERADO 2500HD 6.0 - thermostat location and replacement

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  • Chevrolet Master
  • 2,984 Answers

4.8L, 5.3L & 6.0L Engines

  1. Remove the air inlet duct.
  2. Drain the cooling system.
  3. Remove the radiator outlet hose.
  4. Remove the thermostat housing bolts.
  5. Remove the thermostat from the water pump housing.

The O-ring seal is integral to the thermostat housing



2003 CHEVROLET SILVERADO 2500HD 6.0 - c17hydro_16.gif

Thermostat housing-4.8L, 5.3L and 6.0L engines


To install:

  1. Install the thermostat to the water pump housing making sure the spring side is inserted into the engine.
  2. Install the bolts.
    • Tighten the bolts to 11 ft. lbs. (15 Nm).
  3. Install the radiator outlet hose.
  4. Fill the cooling system.
  5. Install the air inlet duct.
  6. Test the system for leaks.
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Posted on Nov 13, 2010

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Posted on Jan 02, 2017

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355ttrex
  • 249 Answers

SOURCE: where is the knock sensor on the secondary side of

You have to remove the intake and they are under rubber caps in the lifter valley.. 1 is the front and 2 is the rear. This is not a hard job but requires special tools for the fuel line fittings or quick disconnects. They intake gaskets are fairly expensive but if you have average skills you can do this in an afternnon easy.

Posted on Jul 30, 2010

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