99-06 vs 07-14

[hatzie]

The LS motors have issues with the oil pump pickup tube O-ring and there are some folks that say the bypass valve in the oil pump itself has issues.

The EVAP vent valves are a yearly replacement part for me and I'm not the only one. The local NAPA stocks three or four at all times. NAPA Echlin is USA made or it was in October when I replaced it. GM OEM, Echliln, BWD, Dorman, ... all seem to fail in around 9-13 months. When the electromagnet coil fails to close the valve during the EVAP test the PCM sets a P0455 code. Because the valve is wide open causing a gross leak. I know it's time to make my semi-yearly pilgrimage to NAPA for a replacement vent valve when the MIL lights up.

There are rust belt issues that you will not experience in CA.

Good solid trucks tho.

[Willowrun]

Originally Posted by hatzie

The EVAP vent valves are a yearly replacement part for me and I'm not the only one. The local NAPA stocks three or four at all times. NAPA Echlin is USA made or it was in October when I replaced it. GM OEM, Echliln, BWD, Dorman, ... all seem to fail in around 9-13 months. When the electromagnet coil fails to close the valve during the EVAP test the PCM sets a P0455 code. Because the valve is wide open causing a gross leak. I know it's time to make my semi-yearly pilgrimage to NAPA for a replacement vent valve when the MIL lights up.

Is this code the "tighten gas cap" code? My '05 with 125K has had that for a few months. I've replaced the valve behind the tank and the one on the intake (and the gas cap) and after clearing the code it comes back in a few days. I've heard there is another remedy that involves dropping the tank and cleaning something on top of it that needs air circulation. Haven't tried that yet but now wondering if I have a bad replacement valve.