03 silverado 2wd w/ 5.3 and now has 103k. The spark plugs and wires were changed at 100k. While under heavy load the check engine light starts to flash but doesn't stay on. It does store po300 code. It doesn't feel like it has a miss or any hesitation, it runs like a champ. Any idea or direction would be much appreciated.
Thursday, August 23rd, 2007 AT 4:31 PM