Chances are a Tech II (dealership) scan tool will reveal that your oil pressure is not fluctuating.
The smaller stepper motors have been a problem in the cluster. The dealer will quote you $700 for a cluster. The stepper motor individually is worth about 10 bucks US.
It takes about 2 hours and some minor soldering skills.
We have instructions at out forum with pictures.
www.trailvoy.com Trailblazer enthusiasts!
Possibly the thermostat is opening and closing with the water pressure changes. Could be low on coolant also.
septic shock
Could be low tire pressure or bad end links. Hope you are asking about a Chevy Trailblazer!
A Trailblazer that squeaks only when turning to the left could have a problem with the steering or front wheel bearing. Turning to the left puts the right pressure on the parts to cause them to squeak.
It goes up while driving and down when you're idle....that's normal
Check to see where leak originates could be: Leaking pump seal Leaking high or low pressure hose Could be steering rack
Defective radiator cap? Leak in system (Pressure test)? Head gasket?
It is totally normal for blood pressure readings to fluctuate throughout the day, even in healthy individuals. If readings are consistently high or low then the best advice would be to consult a doctor.
There could be different reasons the security light is coming on in your Chevy Trailblazer. The fuse could have blown or there could be a wiring short.
A camshaft can break for several reasons. The shaft could have a defect causing it to break, or something in the engine could bind up and put pressure on the camshaft, causing the damage.
the dashboard cluster could have broken. That happened to my 2004 trailblazer and I had to get it replaced
If you brake lights are not working on your trailblazer it could be due to a number of reasons. Your fuse could be blown, or your light may no longer work.