3.42 or 3.08 are very common in these last few years of the K5 Blazer/Jimmy.
The 'G' codes from the glovebox indicate a ratio. Post the codes here for decipering our you can probably Google them up yourself.
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'66 C10 longstep - Clifford equiped
'84 C20 Suburban 6.2L - awaiting 4x4 conversion
'91 V3500 Crewcab - awaiting diesel swap
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