Question about 1997 Oldsmobile Bravada

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Problem with heating up and staying heated.

My '97 Oldsmobile Bravada has a problem heating up. From the moment I start the car the heat gauge climbs all the way to the red line rather quickly. It is not overheating because it is blowing cold air. It stays in the red for a while. Just before it starts blowing hot air I hear a loud popping sound coming from under the hood. Then the gauge will fall back a little ways and blow hot air. But it does not stay like that. Then it will fall back to the red line and blow cold air. Then the popping sound again, it falls back, and blows hot air. Its a back and forth type thing. What could be the problem?

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  • 2,465 Answers

Thermostat is sticking or heater core is not keep running it or it is going to ruin the engine. It is running hot regardless if is blowing cool or hot air. Do not keep using the car.

Posted on Apr 16, 2017


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

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Posted on Jan 02, 2017

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SOURCE: Car was overheating now the temp gage does not move off C

Try flushuing the system and replacing the thermostat first, then if the problem persists have a shop do a test for a leaky head gasket, but do the easy cheap stuff 1st, only makes sense to me, how about you?

Posted on Oct 07, 2008

  • 6 Answers

SOURCE: my AC in my 95 aurora blows out hot air.

Try either having it recharged by a pro or I believe you can go to auto zone and by the ac recharge in a can. I f that doesn't work it could be the trinary switch.

Posted on Jun 29, 2009

  • 2702 Answers

SOURCE: heating problem driver side blowing hot air passanger side blcold

its likley to be the pipe has been riped off or fell off or its the flaps on the heater box its self not opening,,,have a look under the dash to fine any pipes that are off the heater box,,
anyhow, who cears if the passanger gets cold,,, its the driver who needs to keep warm!!!!
unless its the other half? or worse still its the mother in law!!!! ho ho ho!

Posted on Nov 05, 2009

  • 1 Answer

SOURCE: new heatercore but no heat flushed system out but

2000 Oldsmobile Bravada heater blows cold air. Had a new heater core put on that isn't it,new antifreeze,

Posted on Nov 07, 2009

  • 8836 Answers

SOURCE: My temp gauge goes up to the hot but doesn't


Try stopping on a steep incline--does the heater stay warm? If yes, what you have is an air bubble that hangs at the heater hose until pressure from the water pump blows thru it as the engine speeds up. Park on an incline, open the radiator cap, run the engine until the thermostat is open, turn the heater on, crack open any/all bleed ports to release any trapped air, and fill the radiator to the neck. Wait until the level stops dropping and make sure bubbles don't continue to come up. If they do, you may have a blown head gasket that will keep forming these bubbles until you change the gasket.
Please let me know if you have any questions and thanks for using FixYa.

Posted on Apr 08, 2011

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your actuatior valva is can order 1 from auto parts giant online for about 45 bucks the dealer wnats 240.00 that will give the heat and air back

Feb 18, 2009 | 1999 Oldsmobile Bravada

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With engine cold, remove rad cap & check level in rad. Top it up if needed to 1 or 2 inches from top. Start engine, turn heater on (not defrost) and observe coolant level as engine warms up, add if necessary. Radiator fan should be off, and only come on when engine reaches normal operating temperature, for a short time, then shut off again. Let it run until that happens about 3 times, then put rad cap back on. If temperature gauge climbs up over normal toward hot, too much, shut it off. Do you now have heat? Is rad fan acting as I described? Let me know.

Jan 25, 2009 | 2001 Ford Escort ZX2

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I would replace the thermostat and temperature sending unit.

Dec 26, 2008 | 1997 Oldsmobile Bravada

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