Since the only code that I'm able to retrieve are 4 separate P0430 codes 2 Bank 1s and 2 Bank 2s I will probably will need to look at the Fuel pressure since the harness and exhaust system itself seems free from obvious leaks and structural damage. 1996 GMC K1500 Sierra SL 5.7L MIL Lamp on, Code P0430 Posted to GM Driveability on 5/26/2004 16 Replies After a major tune up vehicle was driven for about a week before mil came back on with a P0430 stored.
All Genuine GM parts are covered by GM's 12 month "parts warranty period" from the date of invoice. If this part is defective, you should be able to get the warranty claim processed by your local GM dealership's service department, or any GM dealership nationwide with a copy of your invoice. We will also be able to assist in any warranty claims.