Question about 1996 GMC Suburban

1 Answer

Temp Gage shoots up and down

I have a 1996 GMC Suburban. The past week or two temperature gage seems to be malfunctioning. After only about 5 minutes of driving the temp gage will shoot up and then shoot back down. It will shoot up to the red zone, stay there for a minute or so and then rocket back down to below normal. Even though the gage shoots into the red zone, the truck never over heats. Never hear any hissing, never see steam and seems to perform just fine. We used to pull over when it got to the red zone but now we just drive through it because it always comes back down without incident.

Any ideas?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

POSSIBLY A FAULTY THERMOSTAT

Posted on Dec 28, 2008

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine temp gauge not reading and ac will not turn on due to engine hot warning, diognostics say its a sensor, need to know which one and can i do it myself?2003 saturn vue


What diognostics say its a sensor ?????? No diagnostic's ever tell's you it's a sensor . You as a technician would need to prove that by testing electrical circuits , viewing coolant temp sensor . Hooking scan tool and trying to command the gauge with by directional control . The temp gauge not showing any temp. ? No movement ? Engine Coolant Temperature Gage Inaccurate or InoperativeStep Action
Yes
No
Schematic Reference: Instrument Cluster Schematics
1
Did you perform the Instrument Cluster Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Instrument Cluster
2
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the Lamp and Gauge Check in the IPC Special Functions list.
Does the engine coolant temperature gage move up and down when commanded?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3
3
Replace the IPC. Refer to Instrument Cluster Replacement .
Did you complete the replacement?
Go to Step 4
--
4
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2
Would hate for you to replace the coolant temp sensor an find out that's not the problem ! Does the vehicle start an run good ,trans mission shift good ? If so it's not the coolant temp sensor .
Engine Coolant Temperature Gage
The ECM sends coolant temperature as determined by the coolant temperature sensor to the BCM via CAN serial data. The IPC displays the engine coolant temperature with the gage when the BCM sends a class 2 message to the IPC indicating coolant temperature percentage. The engine coolant temperature gage defaults to cold (0°) or below if:
• The ECM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the BCM.
• The BCM detects a loss of CAN communications with the ECM.

Aug 19, 2017 | AC Cars & Trucks

1 Answer

TEMP GAGE JUST QUIT , AUTO ZONE PUT SCANNER ON IT CODES P0480 AND P0116 CAME UP , GOING TO change the temp gage sender , but i think something else is wrong , find out after i change tsu ,


code p 0480 refers to engine coolant blower motor 1 ---circuit malfunction=== causes ---wiring ---engine coolant blower motor ---ECM
code p 0116 refers to engine coolant temperature (ECT) sensor ---range b/performance problem ====causes coolant thermostat---poor connections---wiring---ECT sensor

May 07, 2017 | Cars & Trucks

1 Answer

I cannot seem to find the engine cooling temp sensor on a 2007 buick rendezvous


Hi Julia , why do you believe you need to find the temp sensor ? Temp gauge not working ? The cooling Temp sensor is a input to the PCM / ECM - engine computer .
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature (ECT) as determined by the powertrain control module (PCM) or the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the ECT. The range on the ECT gage is between 60-125°C (140-260°F). The ECT gage defaults to 60°C (140°F) or below if the PCM detects a malfunction in the ECT sensor circuit. Refer to Cooling System Description and Operation .
Would have DTC- diagnostic trouble code stored in Instrument cluster or the check engine light would be on . Before replacing a part you may not need take it to a qualified repair shop to have it diagnosed .

Apr 08, 2017 | Buick Cars & Trucks

1 Answer

What is the check gauges light


CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred.
· Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.

If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance


Oct 16, 2009 | 1999 GMC Jimmy

5 Answers

Temperature gage not working,gas,gears gage are ok.


located the temp sending unit check that its pluged in, if it is unplug it and ground the wire to something metal (with the switch on) and see if the gauge moves if it does then your temp sending unit is bad and needs replaced

Aug 01, 2009 | 2004 Pontiac Grand Prix

2 Answers

Suburban 2001 temperature gage fluxuating from high to low


Is it just the gauge or is the engine coolant temperature varying? Does the heater seem to vary in temperature when it is on.
It could be a couple of different things.
One could be a malfunctioning temp sending unit, it has lost its calibration.
Two, your thermostat is cycling open and closed from a weak return spring, worn out.
Make sure coolant level is correct and the mixture is 50/50.
Let me know.
Regards,

Apr 09, 2009 | 2001 Chevrolet Suburban

1 Answer

Caravan 1994 (3.0 Liter engine) No heat


U have a problem with the air temp control blend door actuator motor, very common failure. In order to replace this part the dash must come out.

Jan 14, 2009 | 1994 Dodge Caravan

1 Answer

Problem with idle


engine coolant temp. sensor is probly cracked it will cause the idle to race, car may smoke, and at time could be hard to start.. It is about 15 dollars, and it is located on the right side of the head if you are looking at the engine.. pull it out you will be able to see if the tip of the ceramic tip is cracked.

Jan 08, 2009 | 1996 Saturn SL

3 Answers

2001 Pontiac Montana Temperature Gage and Fuel Gage malfunction


sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

Nov 02, 2008 | 2001 Pontiac Montana

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

225 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...