Hi Scotty,
I'm running a 2007 Chevy Silverado 1500LT with over 195k miles on. I recently purchased a CGSULIT 530 scanner to see if I have any hidden codes that the truck is producing despite the check engine light not being on and the fact that the truck so far starts and runs fine. The scanner picked up code P2635, P2534, P062F, P0562, P0602, P0603, P0231, P0232, & P023F. Is this an early indication of a failing fuel pump or could this be a faulty sensor? As stated, the truck runs fine and the engine cranks over without issue upon turning the ignition key.
Thanks.
Roger Z.
Florida
Check the fuel pump relay and fuse first. If they're ok then I'd suspect the fuel pump.
I actually tried the relay swap test by swapping it with the AC relay, but still the code is coming back. I'll check the fuse but I think that if the fuse was completely out, my fuel pump wouldn't work at all and the truck wouldn't start as a result. This is some kind of electrical hiccup somewhere I suspect.