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Discussion Starter #1
also has noticable misfire at idle when it occurs with no codes for it

anyone know anything? lifters maybe?
 

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The base engine is really no different from the non-hybrid engines. Had a number of them gall the lifter rollers and cam. Had a few collapse lifters. Had a few explode the lifter and ruin the bore.
The intermittant loss of pressure could be a bad sensor or plugged valve lifter oil filter under the sensor.
 

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Not trying to be a smart ass but your not confusing the loss of oil pressure for when the engine shuts off right? A friend drove ours one time and called me 5 minutes after he left and said he has to keep the engine revved to 3500 at traffic lights in neutral or it looses oil pressure lol.
 

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Check for a recall!

After all, it is a GM.
 

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You most likely have the AFM engine.
1. Bad AFM Manifold. (that's the valley cover plate on an AFM motor)
2. clogged filter under the Oil Pressure Switch/sender
3. Possibly a collapsed AFM lifter. But once those collapse, they stay collapsed.
 

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Not trying to be a smart ass but your not confusing the loss of oil pressure for when the engine shuts off right? A friend drove ours one time and called me 5 minutes after he left and said he has to keep the engine revved to 3500 at traffic lights in neutral or it looses oil pressure lol.
So the hydrid Tahoe shuts itself off after too much idle? Or is it like a Prius where it switches from engine to electric on its own?
 

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So the hydrid Tahoe shuts itself off after too much idle? Or is it like a Prius where it switches from engine to electric on its own?
Not exactly like a Prius but similar. It will go into electric mode at traffic lights or when your crawling around parking lots and slow speed stuff.
 

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So the hydrid Tahoe shuts itself off after too much idle? Or is it like a Prius where it switches from engine to electric on its own?
Not like a Prius at all.

The Prius, unlike a Tahoe, doesn't break down. :p
 

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Why is there a hybrid owner on yellowbullet?
because the sumbitch tows like a big block! a all alum 6.0l v-8 and 2 x 75 kw motors in the trans . gets 20+ mpg around town .
yes they shut down, the tach goes past 0 to auto stop .
flip your radio display to hybrid and watch power flow.
a spark plug or wire will eventually go bad and miss fire but not enough for the CEL to go on or set codes .
 

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Not like a Prius at all.

The Prius, unlike a Tahoe, doesn't break down. :p
had one mirror vibrate at speed ,a 12v battery fail and a sticky hatch latch in 100k
the battery was from a radio that would not power down
dont ask about the amount of prius failures in the same time at the dealership
 

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Very strange driving a Tahoe hybrid. Takes a little getting used to.
 

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Like someone else said. They pull like a big block. Motor makes 333hp I think they rate it at plus the electric motors so when you need to get going it moves.
 

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Also if it has the Displacement on Demand, it will foul the plugs in the DoD cylinders faster than a regular engine so you could have two things going on if that's the case.
No it kills fuel/spark to the 4 cylinders that are deactivated. Plug fouling is a thing of the past. We have several displacent on demand vehicles (work trucks) and 2 of the 3 are past 170k miles on factory plugs/wires. I've learned if it ain't broke don't fix it.
 
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