If I have to stop uphill on an incline while towing my boat my electric motors don’t have the power to get me rolling again. Shouldn’t the gas engine engage under a load? I’ll have it floored but just hear the electrics straining without any forward motion.
2012 Yukon Denali hybrid will not move from dead stop on incline..
- Thread starter SIDIFIED
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swathdiver
Full Access Member
Something doesn't seem right Sid. Your fellow Hybrid owners will chime in soon enough. Do you have a good scan tool that can see what the computers see?
NEVER ever tow on the D gear you will burn up the electric motors and transmission...
This vehicle is equipped with a 4 Speed Automatic for towing..
TOW MODE aka "M" on the shifter
this will also shut off Autostop and electric motors..
DON"T try and keep using the electric motors to tow.
They are not meant to TOW anything.
you will burn them both out it might also burn up the CVT portion of the transmission..
it only has Dual 80HP/184 ft./lb motors that is only enough to move the SUV by it self to upto 29mph...
the CVT is only limited to 900 pounds tow.. like the Prius.
but still wise to just use the tow mode.. this will lock out the CVT to only generating power for the electrical grid and A/C
if the engine still does not start ..
turn on the heater.. this will force the ICE to run in v8 mode only
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Anything past 15% throttle input should automatically start the ICE. A weak/deteriorated hybrid battery will cause this symptom. Under a heavy motor amp/current draw the bad hybrid battery does not have enough juice to crank the engine at the same time as the heavy amp draw. This is why so many people with old deteriorated hybrid batteries complain abou tthe semi-stall from a deadstop. As these Two Mode units age it is becoming more and more common to see these hybrid battery failures. New hybrid replacement batteries are expensive and have become rare as hens teeth. Most people will be stuck with a GreenBean type replacement (old battery with old modules).... These Two Mode units are quickly becoming dinosaurs LOL
