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Re: 2004 cadillac deville has intermittent dead battery
Do a load test on battery may have a weak cell and is in of replacing they may have left radio and key on which was enough to drain what was left in the battery maybe only operating on 11.5 volts put on all accessories and rear defrost and see what the battery gauge does if it goes really high or if it stay normal or shows a low reading
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You most likely will need dealer help on this, these older TPMS are not easy to calibrate, it requires a scanner. Next time you need to disconnect the battery use a small charger so the system remains powered up and you don't experience this kind of lost data problem
First of all I would recommend getting Goodyear or Michelin Brand tires for the Cadillac or any other vehicles. I've had very good luck with these brands, as a technician for tires.
Secondly, I would make sure that the tires are inflated to the max. pressure recommended by the placard on the door.
Generally, 35 psi is the max. cold temperature. But, check to make sure it isn't higher for a heavy duty suspension model, if that's what you have. For instance, on my 1997 Cadillac Deville Limousine I have a spec. of 44 psi which is higher than the 35 psi I usually recommend for regular Cadillacs (say like my 1990 Cadillac Deville).
High speed vibrations can usually point to tire problems, as you probably already have suspected.
Good luck on making your Cadillac run like a dream.
the shop is trying to sell something not needed. i have done many change overs without changing anything but refrigerent ant adding they oil supplied in the 35$ change over kit offered everywere.some have many years and miles on them and are ok.the arguement the shops will give are well sir, your compressor will go out.not, and if it did so what change it when it broke. the orings will leak.not my first change over kit job was in 1999 and the a/c still works fine. so get the r12 to 134a kit at walmart it will work unless it dont work now wich would mean it leaked out or some other failure. if so fix leaks/repair system then recharge