I'm getting a P0430 Code on from my '04 Chevy Tahoe. Any fixes?

P0430 https://www.obd-codes.com/p0430

Most have the code on the back of the radio, or written in the owners manual. If not, dealer may be the only way. They require proof of ownership. Is that your issue?

Catalyst System Low Efficiency Bank 2
As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first. could also be vacuum leak or exhaust leak

it is the o2 sensor next to the catalytic converter which is the bank 2 sensor

as long as the distributor wasn't removed no

It goes by the firing order of the engine .. Find which piston fires 2nd and that side of the engine is bank 2.

the EGR vavle needs tested and cleaned or replaced

You can check to see if you blew the cigarette lighter fuse by checking in the fuse box under the hood on the driver side. The fuse will be in the bottom right hand corner of the fuse box towards the windshield. If it lights up when test, the fuse is ok. What I found out on my '04 Tahoe was that in '03 GMC started making the CAN (Controller Area Network) which will not be compatible with plain OBD 2 Scanners & seem as though something is either wrong with the machine or car connector port. Believe me, I've taken my Tahoe to several auto parts store & even a few garages to be disappointed & not have my diagnosis done. Be sure that the OBD 2 Scanner you have, says "CAN" on it, or that it is "CAN" compatible & this will solve your issue.

the motor is probably week . the shaft that drives the wiper arm is a steel shaft usaully mounted in a aluminum housing & the 2 unlike metals siez up & CORROID try using a good pennatrating oil on the shaft where the 2 shafts pass though the tail gate

PO430 Bank 2 Catalytic Efficiency Below Threshold. ...
bank2 is ur passenger side o2 sensor needs to be changed the one closest to catalytic converter