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Re: 99-06 vs 07-14
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.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
Last edited by hatzie; 02-17-2022 at 01:49 PM.
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