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    2008 Tahoe Hybrid sitting for months...

    That video helped a bit. Now I see the cover the comes off to get access to the wiring for the two motor/generators. Towards the front of the inverter under that now removed cover, theres some device there. If I'm remembering correctly, that is about where the AC HV wiring enters the inverter...
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    2008 Tahoe Hybrid sitting for months...

    I was thinking it would be in the HV battery enclosure, but looking at the exploded view of the HV system as a whole, the 300V AC compressor has a short wiring harness that goes to the hybrid controller / inverter. I remember taking the plastic cover off that unit ( Under hood, rear ,passenger...
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    2008 Tahoe Hybrid sitting for months...

    I have the original Hybrid Tahoe owners manual for the vehicle, I read the same thing. In several other areas in the HYBRID MANUAL, it describes features, functions and procedures of the gasser Tahoe, as if GM forgot to edit the sections for the Hybrid. This jump starting section in the HYBRID...
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    2008 Tahoe Hybrid sitting for months...

    I would have no problem making an individual cell charger or making a 300V+ charger... if I had to go that route. I'm going to try the onboard Jump-Assist first. I just need to get a Tech 2. I'm not sure I understand your remote start button comment --- I think 2x lock then start button is...
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    2008 Tahoe Hybrid sitting for months...

    No the vehicle is in Wisconsin. I'm seeing some Tech 2's for $250, some in the $350 range, some over $450.... most are shipped from China. Just wondering, what is the new price for a Tech 2 scan tool.... I know scammers with fake items like to price things really cheap.... I don't want to fall...
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    2008 Tahoe Hybrid sitting for months...

    Well, I found this using Jump-Assist as a keyword... looks like I have to get a Tech 2 Scan tool to initiate the APM to charge the 300V pack from 12V. Now, to find a Tech 2 Scan Tool that will work.... I'm very leery of the chinese knock offs that are flooding ebay and amazon .... or are they OK?
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    2008 Tahoe Hybrid sitting for months...

    The 12V battery under the hood is not the problematic issue - it can be easily charged and/or replaced. Its the 300V hybrid battery under the rear passenger seat that I need to charge somehow. To start the engine, one of the 300V motors in the transmission spins to crank the engine - that motor...
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    2008 Tahoe Hybrid sitting for months...

    My 2008 HyHoe was running just find although I think the original 2008 hybrid battery was starting to go. I was not getting much distance running on just the battery... far shorter than usual. I parked it in the fall, I didn't disconnect the batteries expecting my wife to run the engine once a...
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    Reduced Engine Power - P2135

    I do the same thing. This location though, no way to see anything unless you started removing stuffz.
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    Oil pressure sensor replacement

    If you do it yourself or have a shop do it. Remove the oil filter then with the oil pressure sensor removed, flush out that oil passage from the top down... with some sort of oil dissolving cleaner like brake cleaner, carb cleaner etc... then blow it out with compressed air. That passage from...
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    Reduced Engine Power - P2135

    AH HA!!!! I FIXED IT!!!! I was going on the theory of a bad connection at a connector. So Starting at the fuse block, I started removing things. I pulled the fuse block assembly, then the relay block, working my way down to the ECM, I pulled the ECM out of the bracket and while finagling...
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    Tahoe Hybrid AC schematic ??

    I'm trying to troubleshoot my AC system. The AC was working the last time I used it, which was last fall, but over winter, something went sideways from lack of use. Now all I get is the three LED flashes and no AC. I checked the refrigerant pressure, its good. The temperature is warm so its not...
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    Reduced Engine Power - P2135

    The TPS that is on the throttle body is a dual potentiometer (dual variable resistor)... that is where they get the sensor #1 and sensor #2 ... not the Throttle Position Sensor and Accelerator Pedal Sensor being #1 and #2. Its an educated guess since I have not taken one apart ... yet.... but...
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    Reduced Engine Power - P2135

    2008 Chevy Tahoe Hybrid DIC - Reduced Engine Power ECM error code P2135 Throttle Position Sensors 1-2 not plausible ------------- I have: removed and cleaned the throttle body replaced the throttle position sensor - AC Delco TPS onto the original throttle body replaced the complete...
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    Front Passenger Seat bolt covers

    I have a RAM laptop mount that I would like to install in my 2008 Tahoe Hybrid 2wd, however I'm having a difficult time getting the bolt covers off the seat rails/feet. I don't want to pry in the wrong area and break the plastic covers. So, the question is... how do I take these covers off so I...
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    Trans slipping, auto stop not working, engine RPM racing, gauges funky...

    Update #2 The rain stopped ... yay. So I pulled the fuses for the ECM(batt), TCM(batt), and HVAC(batt), I turned the key to start, it was a no crank-no start condition and set codes. The trans aux pump was heard clearly ... kind of noisy in my opinion. I then put those fuses back in and then...
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    Trans slipping, auto stop not working, engine RPM racing, gauges funky...

    Update: I pulled the Hybrid disconnect and disconnected the 12v battery, left it disconnected for an hour. No change. In fact I don't think the hybrid battery was fully disconnected because the radio still had the current time, radio presets, the trip counters and other info were not reset to...
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    Trans slipping, auto stop not working, engine RPM racing, gauges funky...

    Today my 2008 Tahoe Hybrid went funky. No codes, no engine light, just suddenly it seemed that the transmission started slipping. The engine RPM would suddenly go up when accelerating. Then at a stoplight, my engine RPM went to over 3000 without touching the gas pedal. I tapped the gas pedal...

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