The 2006 Chevy TrailBlazer oil pressure sensor is situated at the back of the motor where the transmission meets,near the firewall. Having excellent oil is key for the motor to flawlessly run. You will run into issues with the oil eventually. A typical issue is a terrible consuming smell. This should be seen intently at the earliest opportunity or the vehicle could detonate. Terrible oil can make the motor come up short. Thumping clamor might appear from the motor. You could encounter unfortunate gas mileage. Your oil should be changed out sometime in the not so distant future. Each 5，000 to 10，000 miles or a decent guideline is as well. On the off chance that You don't supplant it,there will be issues with the motor.