Originally Posted by Jaime

Keep on troubleshooting.
Found the following:

#PIT4820A: (hybrid) Service Power Steering Message With DTC C0895 - keywords 2-mode battery code electric hp2 indicator low mode module power PSCM two-mode voltage 2 - (Feb 16, 2011)

Condition/Concern:
You may experience a "Service Hybrid Message" on the Drivers Information Center (DIC) followed by a DTC C0895 set in the Power Steering Control Module (PSCM).

Recommendation/Instructions:
If you experience this message, please check all other module for diagnostic codes before addressing the C0895 DTC. Most likely the code was set due to a hybrid related concern that caused the 300 volt hybrid battery contactors to open which in return will set a C0895 code in the PSCM.


Clear the codes with your tool, and then also try disconnecting the 12V battery for some time.

Originally Posted by Chicago38

Hello. I have Tahoe Hybrid 2008 car not started.We install new 12v battery but car still not started.
I have 2 trouble code:
P0C17 Drive motor A position sensor not learned
P0C18 Drive motor B position sensor not learned
Any body help me please.
Thanks

Originally Posted by Tahoe_08

you screwed up you need to use one of those "remember" settings things before swapping the battery

Originally Posted by Chicago38

I try everything. I think my problem in APM module because when I try reading APM module my scanner freezing.
Where APM module location?

Originally Posted by Jaime

The Accessory Power Module is the component stacked at the bottom of the assembly under the plastic cover on the passenger side of the engine compartment. It is under the Power Inverter Module (PIM) assembly.
I would recommend scanning other modules first to see if you can read the 42V from the APM since it is pricey (ranges from $400 to $800.) Inspect the wires and connectors going to the APM.