Question about 1998 GMC Sonoma

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Where to wire in the vss #3 wire from compass temp unit in a 1998 gmc sonoma

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Posted on Jan 02, 2017



  • 1 Answer

SOURCE: 1998 gmc sonoma push button 4x4 busting diaphram vacuum actuator

On top of the transfer case is a vacuum switch with 3 vacuum lines connected to it. This switch controls when vacuum is applied to the vacuum actuator. This switch can fail partly and allow fluid from the transfer case to be sucked up into the vacuum lines and anything connected to them as well. When you replaced the actuator before, did you notice any oily fluid inside of it?

Posted on Dec 23, 2008


Jonah Oneal

  • 14092 Answers


check the wiring insrument cluster to the temp sensor. check the ground wire.

Posted on Apr 07, 2009

paul campbell

  • 1071 Answers

SOURCE: GMC Sonoma SLE 4.3L 1991- Coolant Temp Gauge Not reading

there are 2 coolant sensors one for gauge and one for ecm

Posted on Jul 23, 2009

yup it broke

  • 105 Answers

SOURCE: What refrigerant is used in the 1998 GMC Sonoma AC

R134A yes it can be recharged at any certified a/c repair shop

Posted on Oct 29, 2009

six speed

  • 92 Answers

SOURCE: Temp/ Compass works some of the time.

check the wires going to the mirror

Posted on Jul 01, 2010

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1998 GMC Sonoma. The fuel gauge is stuck on a bit over 1/2 tank, but it drops down to empty when I shut the engine off. Is it the sendin unit, or could it be something else? Thanks in advance.

If you don' having any wiring issues I would think you should look into the gauge.
The gauge has a memory. It is supposed to stay in its last position when the key is turned off. There would be no more power going to the gauge once they key is turned off so it can no longer read resistance to ground from the sender.

Sep 01, 2011 | 1998 GMC Sonoma

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Where is the oil pressure sensor / sending unit on a 1998 GMC Sonoma with a 4.3l V6?

It is at the very top rear of the engine behind the intake to the right of the distributor on a thin lip of metal of the engine block.

Jan 13, 2011 | 1998 GMC Sonoma

1 Answer

Temp/ Compass works some of the time.

check the wires going to the mirror

Jul 01, 2010 | 2001 GMC Sierra 1500HD

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My oil temp spiked then loss of power any suggestions?

yeah man, check your oil pressure sending unit....if its bad, replace it...i think GM ran the ground for the fuel pump through this sensor, allowing it the loss of power that you have described...

Nov 19, 2009 | 1998 GMC Sonoma

2 Answers

1999 f250 diesel speedo and odo are intermitant

the speedo is activated by the VSS in the transmission
check wires and that unit

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Overhead console wiring diagram

Compass/Temp w/o Trip function

Yellow - Key on 12v
Black - Ground
Light Green/ Black tracer Ambient air temp sensor At about 70 deg I have almost 10K ohms resistance. Just for a point of reference.
Dark Green VSS
Brown Goes to the dimmer switch that adjusts the brightness.
Gray Goes to headlight switch so the display will dim when the lights are on

Mar 10, 2009 | 1998 GMC Blazer

1 Answer


check the wiring insrument cluster to the temp sensor. check the ground wire.

Feb 25, 2009 | 1995 GMC Sonoma

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