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Old 07-10-2020, 08:14 PM   #9
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,911
Re: 2002 2500hd cclb 6.0l gas 5 speed

For people that want to put a manual transmission behind their LS the 2wd manual transmission VIN for this truck is valuable.

You can flash the PCM using AC Delco TIS, an MDI or Tech 2, and this VIN.
1GCHC23U22F172096

Once you have a baseline original GM flash you can save it and tweak the PCM with HP Tuners or something similar.
__________________
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.
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