i have a 2008 tahoe hybrid that i bought three months ago used with 86000 miles and love it, but have had many problems already. Including needed a new tps throttle pedal assembly, dvd screen would work intermittently, and now it has thrown a code for catalytic coverters being clogged. They replaced the dvd unit with a remaufactured unit that now has a bunch of options not programmed on it and are in the middle of sending me the second unit that i will have to switch out. But my real question is has anyone had to replace the converters yet? I was backing out the other day and it puffed smoke like i blew a head gasket, then all of a sudden quit and acted completely normal. But it has been using oil. Its been through 2 quarts in three months of owning it. Im familiar with the ls motor and is why i wanted a tahoe, but im baffled on this one.

 

where did you buy it from? did you get a warranty? you might want to get an engine oil sample and send it to blackstone labs. it has a transferable 8 year/100k mile warranty, so better have it looked at before its too late.

 

it was used from a non dealership and i did not get a warranty. Im comfortable fixing what ever is wrong but. these odd things keep happening. I have look at the oil and changed it. and it all checks out to me. Clogged cats make sense but seems a bit too early to be clogged up to me, but then again this might be a common problem i dont know about with hybrid tahoes. Is the converters covered under the drivetrain factory warranty?

 

engine and tranny and all hybrid components but not the converters, I think.

 

If something went wrong with the engine and excessive oil consumption ruins the converters... they should be covered. Call the 800 number in the owners manual or get to a dealer you can trust. Ask if there are any service bulletins on the smoke and using oil regarding your year and model.

 

Take it to a dealer. The vehicle should be under warranty for 8 yrs/100k. Chevy replaced my engine at 76k and my catalytic converter at 78k. Good luck

 

what were your problems that the tahoe was doing?

 

The replacement was because of oil blow back in one cylinder, it was running rough at idle and I noticed some loss of power. No codes. For the cat, there was a check engine code.

The support of my chevy dealer has been superb!

 

good to know