2009 traverse Ltz crank no start

Does anyone have a known good cam crank relationship? I’m coming up with something weird doing my checks at the pcm and checking bank 1 I’m getting looks like the exact signal for the cam and intake cam. I overlaid them in my scope. I’m thinking they’re shorted together? Has anyone run across this? Getting all 4 cam sensor codes have 5 volt ref and grounds to them all.

There is one from a 2008 model in the Rotkee library. .

rotkee.com/en/waveform-library?brand=161&model=2534

rotkee.com/en/wavebase/good-timing-ckp-c...brand=161&model=2534

I seen it doesn’t label what bank it is or intake vs exhaust cam

Cheryl wrote:

I seen it doesn’t label what bank it is or intake vs exhaust cam

L
It states bank one and shows milage....

Also check the related tab, there are more hidden captures. A total of four. Probably you'll find the original waveform with the author's complete notes in the pico library. Do you have access to it? Otherwise I could have a look later.

This is a relative compression test set on ac voltage 1 volt leads reversed positive at negative post negative at positive post directly at the battery.

Added attachments at the beginning of the post let me know what you think

Cheryl wrote:

Added attachments at the beginning of the post let me know what you think

I think you (only) can tell there is abnormality. NOT MORE. Now its part to of the diagnostic process to determine the root cause.

It catches the eye that the higher voltage drops happen on companion cylinders, so you may have two cylinders high and not four low...

You may also try a voltage drop RC test from engine block t battery negative post. This allows for ec volts in the mV range without inversion. Put a sync as well for cylinder id.

I thought I seen a Scannerdanner video hooking the leads up backwards so it’s like a relative compression test with an amp clamp. So you wouldn’t need to invert it. But customer said if it’s internal then he isn’t going no further he thought it was a fuel pump issue