My Tahoe is running a little rough and I have not had a service done on it lately. When it was shipped to Germany they lost my owners manual and service booklet. The wheels are squeeking, it doesn't seem to be steering as tight as it use to. It's just running a little rough maybe could use an air filter too, gas mileage not as good as it use to be.
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Re: 75,000 mile service
You don't need a service of any kind at this mileage, u do need to have this diagnosed for worn front end parts and a full electronic engine control diagnostic, but i will say this the fuel and air filter needs to be changed every 30,000 miles, it this hasn't been done do so, also the transmission needs a fluid and filter change every 60,000 miles, check tire pressure once a month, all these maintainence items affect performance.
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Check the intake manifold gasket. If it leaks it will draw air into engine and this air bypasses the mass air flow sensor which will cause a rough idle or running symptom from running too lean. If you change the intake manifold gasket you should probably change the valley pan gasket at the same time. A dealer will change both for less than $500 and you might save some more if you dig around on GM Service website and find a coupon discount (Usually 10%-20%). You might save more at a local shop if you trust them and they do this type of work. Getting to the intake manifold gasket also exposes the valley pan and since you are already there it only takes a little more to change that gasket too. Some GM V-8 engines use a little oil between oil changes and if both gaskets are meticulously changed at the same time it will sometimes fix the oil usage. It did for me on my Tahoe (126k miles).
Well if it hasnt then yes. shouldbeen done at 75,000. By the way when you change oil make sure you use mobil. Why penzoil dosent have the proper zinc additive which is an anti wear agent. What I see is cam solenoid getting pluged up causing rough idle.Dont let it be you.
hi this should be done every 50,000 miles or 5 years wich ever comes first, and cost is dependent on where you take it, if main dealer 500 to 800 bucks, maybe more maybe less if you take it elsewhere but rough guide only, hope this helps you
Sounds like the intake gaskets are sucking air when cold. When it warms up then they expand and take up the space and no longer **** air. You can test the theory by spraying a little water on the intake while it's running if it starts missing even more then that is most likly the problem. It's not a hard job to do, but if you do not have wobble sockets then it will be a little more diffacult.
But if they want 600 bucks to do plugs and wires then you need to find another shop to work on your tahoe! That's alot of money for something that only takes a few minutes to do, and the parts shouldn't be much more than 150-200 on the high side!
Did the 'Check Engine' Light come ON? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.