I changed the oil for the first time in my 2001 Silverado 1500. I was going to bring it to a shop because I couldn't get underneath, I was able to after removing the driver's side running board, or whatever it's called (large diameter tubes). Per the manual I downloaded, the procedure to reset the change oil alert was to press the accelerator 3x within 5 seconds when having the ignition in the run position. I tried that several times, the light stayed on. I saw somewhere else the accelerator should be depressed 5x. That did it - or maybe out of the 5 3 where depressed enough to register. The only thing I saw when doing it 3x was the red battery light, went off/on. Either way it's fine, but I wonder if it's possible for a 4.8 L to be different. Since I didn't reference the manual that actually came with the truck, maybe there were some differences in the process?