New Owner Learning
 

Hello All,
Thanks for the add to the group! I purchased a 2008 Tahoe Hybrid about 2 months ago now with 150k on it. It seems this was a fleet vehicle and was very clean. I am a nerdy mechanic for life and would love to learn and more info on this vehicle. I have done quite a few things to My HyHoe since getting it. Everything in front end (upper,lower control arms, both axles and wheel bearings, struts, sway bar links), alignment, tires, etc.. So I plan on keeping it just want to work some bugs out of it. Looking for some help with some minor codes and gremlins. Hoping I can find some info from this community and will have input of what I can help with.
Thanks All,
Jon

Re: New Owner Learning
 

Welcome J I recently bought a 2009 Tahoe Hybrid (affectionately known in my household as the "HO") it had close to 200k on it and I am here for the same reason as you, to try to learn. So far I have done a small amount of work, changed some fluids. Did front diff / rear diff / transfer case / trans fluid / engine oil and installed new front wheel bearings. The ole "HO" seems to be running very well pretty and I am pretty much pleased with it, especially since it was dirt cheap to purchase LOL. I have also taken the hybrid battery apart and cleaned it. I did have a couple of codes pop up recently relating to the hybrid battery. It coincided with running an air compressor from the rear cigarette lighter plug and went away after a couple of drive cycles. I do suspect that I have degraded modules in the hybrid battery. I have ordered a 6 pack of replacement modules but I am in fear that they are Chinese made knockoffs. Will see when they come in.

Re: New Owner Learning
 

I'm really trying to learn more about this "HyHo" too. I have some codes that keep coming up that I can't find what they even mean. I did plugs and wires too and then had cyl. 5 misfire and found a crack in plug porcelain and got that swapped out. Boy! They don't like misfires! bucks like a wild horse. LoL! Just working a few bugs out of it then hope to learn more about testing and replacing modules if needed. The other issue right now is after replacing Bank 1 Sensor 2 O2 is says it's stuck lean And stuck Rich!?! Does anyone have a good list of codes to find a couple others that keep popping up?? Hoping some "nerds" chime in here to help us owners out. Would love to keep this HyHo going as I love working on the rest of it and Cheap parts for everything else.

Re: New Owner Learning
 

Check out this list of codes by control module:
https://gsi.ext.gm.com/gmspo/mode6/2008eparms.html
Look at the "Two - Mode Hybrid" pdf files at the bottom.

Re: New Owner Learning