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92 vert LT1 I have a H64 in module 9.
FSM shows 64 as right o2 sensor, after a lot of searching, I found a post that says mod 9 64 is the TPS
According to the FSM 33 is the TPS code
Its H64 which, I think, its a historical code, but I cant seem to reset it, I tried the manual CCM method and neg battery disconnect
Figured it out, following wires found the TPS mod (under blower motor) had the connector halfway out( not seated properly) reseated the connector and I was able to reset the 64 code. only time will tell if that keeps the code away