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Don't know where to put this on forum maybe some one can move them right

GM 2 Digit Trouble Codes Tech -- GM 2 Digit codes for 82 and up (non OBD-II) code - code definition 12- diagnostic mode 13- 02 sensor or circuit 14- coolant sensor or circuit/ high temp indicated 15- coolant sensor or circuit/ low temp indicated 16- system voltage out of range 19- crankshaft position sensor or circuit 21- throttle position sensor or circuit- voltage high 22- throttle position sensor or circuit- voltage low 23- mixture control (m/c) solenoid or circuit (carbureted models) 23- manifold air temperature (mat) sensor or circuit (1990 and earlier models) 23- intake air temperature (iat) sensor circuit (fuel-injected models) 24- vehicle speed sensor (vss) or circuit 25- manifold air temperature (mat) sensor or circuit - high temperature indicated (1990 and earlier models) 25- intake air temperature (iat) sensor or circuit - high temperature indicated (1991 and later models) 26- quad driver module circuit 27- quad driver module circuit 28- quad driver module circuit 29- quad driver module circuit 31- park/neutral position (pnp) switch circuit 32- baro sensor or circuit (carbureted models) 32- egr circuit (fuel-injected models) 33- manifold absolute pressure (map sensor signal voltage high 33- mass air flow (maf) sensor or circuit - excessive airflow indicated 34- manifold absolute pressure (map) sensor signal voltage low 34- mass air flow (maf) sensor signal - low airflow indicated 35- idle speed control (isc) switch or circuit (shorted) (carbureted models) 35- idle air control (iac) valve/ circuit 38- brake switch circuit 39- torque converter clutch (tcc) circuit 41- no distributor signals to ecm, or faulty ignition module ( carbed models) 41- cylinders select error- mem-cal or ecm problem ( fuel-injected models 41- cam sensor circuit (3.8 engine) 42- bypass or electronic spark timing (est) circuit 43- low voltage at ecm terminal l (carbureted models) 43- knock sensor circuit 44- oxygen sensor or circuit - lean exhaust detected 45- oxygen sensor or circuit - rich exhaust detected 46- power steering pressure switch circuit 48- misfire diagnosis 51- prom, mem-cal or ecm problem 52- calpak or ecm problem 53- egr fault (carbureted models only) 53- system over-voltage (ecm over 17.7 volts) 54- mixture control (m/c) solenoid or circuit (carbureted models) 54- fuel pump circuit (1986 and later models) 55- oxygen sensor circuit or ecm 55- fuel lean monitor (2.2l engine) 61- oxygen sensor signal faulty (possible contaminated sensor) 62- transaxle gear switch signal circuits 63- manifold absolute pressure (map) sensor voltage high (low vacuum detected) 64- manifold absolute pressure (map) sensor voltage low (high vacuum detected) 66- pressure sensor or circuit air conditioning