Dustoff87

When do you notice it? Accelerating? A certain speed? Braking? Turning? Sent from my SM-G892U using Tapatalk

What was the original reason you replaced the caliper?

I just changed my brake fluid at 178,000 miles. The old stuff looked like crap.

I've been replacing mine about every 2 years.

Hopefully that will solve your pressure problem however, the oil consumption problem is usually tied to the Active Fuel Management. I disabled the AFM and the oil consumption problem was solved Sent from my SM-G892U using Tapatalk

On the top of the motor on the backside is your oil sending unit. If you remove the sending unit and stick a 3" drywall screw down into it you'll feel like resistance, just push through that and then pull it up. You will pull out a small debris screen. Most likely that screen is clogged and needs replacement. It's about a $7 part but the sending unit is a pain to access and the wiring clip can be a pain in the dick to remove. I just snapped off the wiring harness clip to make it easier for next time.

Which motor do you have? Sent from my SM-G892U using Tapatalk

Does your defroster work? I had a silverado where the AC wouldnt work when set to cold but worked when the defroster turned in. If remember correctly it was a pinched wire in the dashboard.

Can you isolate which cylinder? If it's an AFM cylinder I'd consider getting a programmer or a range kit to deactivate it before the lifter collapses. Sent from my SM-G892U using Tapatalk

Have you checked the wires running to the starter? Sent from my SM-G892U using Tapatalk

I assumed the new and old batteries had the negative and positive terminals in the same place? I ask only because I've seen batteries nearly identical with the exception of where the terminals are. Do your interior lights work at all? Or is the whole thing just dead? I'd start checking fuses. Sent from my SM-G892U using Tapatalk

It's probably one of the hydraulic lifters on one of the AFM cylinders ticking against the cam assembly. Very common problem. Could also be a small leak on your exhaust manifold which seals up after the engine warms up. Sent from my SM-G892U using Tapatalk

On my 5.3 there is a small filter element under the oil sending unit. If you're not getting any knocking noises which indicate actual low oil pressure that filter element might be clogged. That's what my problem was. $7 fix for my issue. Sent from my SM-G892U using Tapatalk

I had a similar issue with the starting. It was actually the throttle body. Sent from my SM-G892U using Tapatalk

I beat my steering wheel to hell as well and now have this issue. I found some ball bearings on the floor later on and I also have a ton of play. Let me know how you fix it. I'll probably be doing the same thing soon. Sent from my SM-G892U using Tapatalk