barczy01

I can't remember base timing on those with the aldl plugged in 6 degrees with the engine warm. Those balancers have a tendency to move spin a bit so you never know where you are timing wise.

Pull the wire off the ignition coil and look for chalking on the coil tower too!

Unplug the EGR valve and see what happens. I remember a TSB for replacing the EGR valve and a pcm reflash.

check the red wire on the alternator connector. That wire breaks and will cause a no charge.

innova 3340 meter is decent for a situation like this. You need to see what kind of amp draw is being pulled.

Unplug the fuse or the connector for the seats .

70-100 milliamperes. 1.5 amps way too much

I will send you some info tomorrow to start a parasitic draw test . This is what happens with these older cars over time 15 plus years .

low a/c freon ao46 present? lCear the codes in the ac module through dash and try that.. Might need freon .

Dealer or rock auto.. Why?

Dealer and I think those are discontinued.

Yes but the pump is now on those years 06-11 bolted on the back side the the crossover has to be removed

What year ? 06-11 they changed the waterpump design an removing the entire pump housing ! It’s bolted to the back side .

Maybe contact some of the people on ebay who rebuild Gm clusters and see what they can do for you.

Still fixing these cars after 26 years they are fading away into the junkyards indeed. If your needing any head gasket work or Cadillac car work done in general please contact me. https://www.google.com/search?q=b+%26+b+automotive+llc+46250&rlz=1C1NHXL_enUS707US707&oq=b+%26+B+&aqs=chrome.0.69i59j0j69i57j69i61l3.1476j0j9&sourceid=chrome&ie=UTF-8