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

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?

SOURCE: TEMP GAUGE NOT WORKING ON 95 SONOMA 2.2

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

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

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

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

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

SOURCE: Temp/ Compass works some of the time.

check the wires going to the mirror