2003 GMC Envoy Oil Pressure up and water gauge lower

Tiny
CMDPP
  • MEMBER
  • 2003 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 92,301 MILES
Hi
Help !
A week ago I smelled some burning and noticed oil pressure was past its' usual "straight up" normal.
Added oil and smell disappearred.
Oil pressure only slightly lower. It goes up with the speed, back to normal at idle.
And now, noticed the water guage is running lower.
The water pump was replaced at 71k miles.
What is happening?
cmdpp
Tuesday, August 4th, 2009 AT 7:55 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test the coolant temperature sensor resistances see below and wiring or the thermostat is stuck open.


https://www.2carpros.com/forum/automotive_pictures/12900_CTS_values_5.jpg

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Tuesday, August 4th, 2009 AT 8:44 PM

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