murdrmunkee
TYF Newbie
- Joined
- Aug 8, 2023
- Posts
- 6
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have a 2023 yukon denali 6.2. have a catch can installed and about 43,000km/27000 miles. it was -35*C /-32*F parked outside. no block heater plugged in. I went to start and it started and shut off like a stall. Tried it 3 more times and same thing. tried again and it started up just fine. checked code and got u0198 (telematics control module - no communication) and P0562 control unit 40 (system voltage low). Oil level is at full. have a catch can installed and water vapour within it was all frozen. drove maybe 10 miles to work and drove perfectly fine.
any ideas?
Known issues with the motor
- has had an oil consumption issue which is normal per the manual and per the service techs. line goes to just above low on the dip stick every 2000-2500 miles. so maybe about a quart of oil every oil change. I get an oil change roughly every 5000-6000 km/3000-4000 miles.
- had knock/vibration issues on idle, but since switching to fully premium 91+ octane have not had that issue.
- had black smoke from exhaust on occasion, but since switching to fully premium 91+ octane have not had that issue.
any ideas?
Known issues with the motor
- has had an oil consumption issue which is normal per the manual and per the service techs. line goes to just above low on the dip stick every 2000-2500 miles. so maybe about a quart of oil every oil change. I get an oil change roughly every 5000-6000 km/3000-4000 miles.
- had knock/vibration issues on idle, but since switching to fully premium 91+ octane have not had that issue.
- had black smoke from exhaust on occasion, but since switching to fully premium 91+ octane have not had that issue.
