05 Buick rendezvous 3.4 ,no codes,it falls on its face at 2500 rpm,scanner shows all the timing yanked out of it at that time.fuel pressue good while driving.cat not the problem.

Gauge is probably driven by computer and not the output from the temperature sensor and so gauge reading does not have a direct relationship with the actual engine temperature.

Generic obd2 scanner will read data/faults that can affect the exhaust emissions, which a computer driven gauge will not. Dealer/manufacturer level bi-directional software would be needed for in-depth inspections of all non-emission related systems.

Last time serviced? Any error codes? I'd say fuel delivery system. Are you sure you have gas inspite of the gage?

Common issue for Rendezvous is a faulty fuel sending unit, sometimes referred to as a fuel module (fuel pump, pump filter, float, sending unit, all sold together as a preassembled unit). Go to your local auto parts store. Most have a scanner/code reader that they can connect to your vehicle to download any fault codes.

vacuum leak usually increases rpm--the electrics got hurt from overheat--hav a data stream run-displays values of evry component-so u kno what parts are bad----private mechanic not a dealer- a scanner that uses factory gear not a 30$ tool sold in stores--the vehicle computer may hav an issue-a readout wont disclose it--so disconnect batt n see if problem clears or pull plug on computer and clean the pins--may reboot

DO A SPARK TEST USING A SPARK TESTER AND USE A FUEL PRESSURE TESTER GAUGE TO DO A FUEL PRESSURE TEST.FUEL PRESSURE SHOULD BE 41 TO 47 PSI.IF YOU GETTING NO SPARK.CHECK THE IGNITION MODULE FUSE.IF FUSE IS GOOD.SCAN IT TO CHECK FOR IGNITION MODULE FAULT CODE.PCM FAULT CODE CRANKSHAFT SENSOR + CAMSHAFT SENSOR CODE.IF YOUR FUEL PRESSURE IS 0 CHECK FUEL PUMP AND FUEL INJECTOR FUSES AND RELAY.IF OKAY FUEL PUMP FAULTY.BY USING A SCANNER IT WILL SAVE YOU TIME AND MONEY.NEW FUEL PUMP ABOUT $300.00 AND A NEW IGNITION MODULE ABOUT $200.00.

There is valve that controlls the fluid I had the same problem for the awd 380.00 for the valve + lab

you have a connection problem going to your intrument cluster unless your real handy working on auto`s better take it to a mechnic

oh thats the change oil light expect it every 3500 to 4500 miles they glow.. you can usually reset it by holding down the trip button with the car off and then turn the key to the II position where everything lights up
so read me >>>>>
Buick Rainier 2004-06, Buick Rendezvous 2002-05 w/o (DIC) Driver Information Center
Turn the ignition to ON without starting the engine. Fully press and release the accelerator pedal three time in five seconds. If the CHANGE OIL SOON’ indicator flashes two times, the system is resetting. Turn the key to OFF, then start the vehicle. If the CHANGE OIL SOON indicator comes on and stays on for five seconds, repeat the procedure.
Buick Rainier 2004-05 wI (DIC) Driver Information Center
The DIC display is located on the instrument panel cluster above the steering wheel. The DIG buttons are located on the steering wheel. Press button with the gas pump symbol to display engine oil life. Press button with the arrow symbol to reset engine oil life display.
Buick Rendezvous 2002-06 wI (DIC) Driver Information Center
To reset Service Reminder Indicator, turn ignition on with engine not running. Press the MODE button until DIC reads oil life left hold SET to reset. Press and hold the SET button until 100% is displayed. You will hear three chimes and the change oil message will go out. If the CHANGE ENGINE OIL’ message comes back on when the vehicle is started, the engine oil life system has not reset. Repeat the procedure.