2008 Chevrolet Silverado 1500 5.3L with codes P2635, P069E, P0191.

Question

These are the 3 codes I get on and off when the engine light goes on P2635, P069E, P0191

Answer 1

P2635 Fuel pump flow performance

P069E Fuel pump flow control module (FPCM)  MIL light requested

P0191 Fuel rail pressure sensor

You only have one code condition and that is P0191, For P2635 and P069E the trouble code P0191 cannot be active because this is a active code that also coded up satisfy P0191 code condition which is to replace the fuel pressure sensor.The location of the fuel pressure sensor is along the chasis frame near the ABS module.

Answer 2

P2635 CHEVROLET Code - Fuel Pump Flow Performance
Read more: https://www.autocodes.com/p2635_chevrolet.html

P069E CHEVROLET Code - Fuel Pump Control Module Requested MIL Illumination
Read more: https://www.autocodes.com/p069e_chevrolet.html

P0191 CHEVROLET Code - Fuel Rail Pressure Sensor Performance
Read more: https://www.autocodes.com/p0191_chevrolet.html