Selling my suburban. runs well it needs a little work. it's throwing a code P0175 & P0172

rich bank system (system 1&2) we have replaced the MaF sensor , all 4 O2 sensors and new air filter already but didn't fix it.

we are selling as is we have title in hand

New tires have about than 8k miles on them

we decided to just upgrade so looking to sell.

Cash or Cashier check preferred

located in Park Valley ut

Codes P0172 and P0175 on a Chevy Silverado indicate that both engine banks are running too rich, meaning too much fuel or too little air, often causing rough idling, black smoke, and reduced fuel economy. Common causes include a failed Mass Air Flow (MAF) sensor, leaking fuel injectors, a faulty fuel pressure regulator, or a stuck purge valve.