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Temp gauge not reading right 2003 silverado

Discussion in 'General Chevy & GM Tech Questions' started by crazylikeacharger, Mar 30, 2009.

  1. crazylikeacharger

    crazylikeacharger New Member

    Hey

    got a 2003 Silverado with a 4.8L V8 and the temp gauge isnt reading right. the needle is burried and the truck is not over heating.

    where on the engine is the water temp sending unit???
  2. gaborn73

    gaborn73 New Member

    did you ever get an answer? My 03 suburban (5.3L Z71) has 80k miles and the temp gauge
    started acting up. 24 hours without driving on a 25deg F night and it read 220F upon startup then
    proceeded to climb past 260. Fluids are good. No holes, no smells, suspecting sending unit or gauge itself.
    Anyone have the diagram for a '03 5.3L with wiring?

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