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Re: 98 Tahoe 5.7 ecm/pcm relearn.
Never had to do this, but I'll relate what my '98 C/K service manual says.
1. Original knock sensor chip needs to be in the new VCM
2. Passlock needs to be reprogrammed.
3. CKP Variation Learn Procedure needs to be run. ( High-end scan tool required for this.)
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57 Chevy 210
65 Olds 442 Convertible (Another one sold)
75 GMC Vandura 3/4 Ton
1999 K2500 Old Body Style Suburban (Gone but not forgotten)
05 Dodge Ram 3500/5.9 Cummins
2012 Toyota FJ Cruiser
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