OBDII info

[Tom Hussey]

I wonder if anyone has access to info on GM specific OBDII PID codes. I
am interested in as many as I can get my hands on as they all point at
specific routines and locations within the ECM. I can share the
locations when complete. In any case, here is a list of the supported
PIDs. I expect one of these (or several) is used to flash the ECM.

0000 0001 0003 0004 0005 0006 0007 0008
0009 000B 000C 000D 000E 000F 0010 0011
0012 0013 0014 0015 0018 0019 001C 0020 
0022 0023 0024 0025 0026 0027 0028 0029 
002B 002C 002D 0030 0031

1104 1105 1106 1107 1108 1109 110A 110C 
110D 110E 110F 1110 1111 1112 1113 1114 
1115 1116 1140 1141 1142 1143 1144 1145 
1146 1148 1149 1151 115E 116F 1170 1171 
1176 1179 1190 1192 119D 119E 11A1 11A3 
11BD 11C0 11C2 11C4 11D5 11D7 11D8 11DD 
11DE 11E0 11E3 11E4 11E6 11E9 11EA 11EB 
11EC 11ED 11F3 11F8 11F9 11FA 11FB 

1200 1201 1202 1203 1204 1205 1206 1207 
1208 120A 120B 120C 1212 1216 1217 121A 
121C 121D 1221 1226 1227 1228 122A 1232 
1233 1234 1235 1236 1237 1238 1239 123A 
123B 123C 123D 123F 1240 1241 1242 1243 
1244 1245 1246 1247 1248 1249 124A 124B 
124D 124E 1257 1258 1259 125A 125B 125D 
125E 125F 1260 1261 1262 1263 1264 1265 
1266 1267 1268 1269 126A 126B 126C 126D 
126E 126F 1270 1271 1272 1273 1274 1275 
1276 1277 1278 1279 127A 127C 127D 127E 
127F 1280 1281 1282 1283 1284 1285 1286 
1287 1288 1289 128A 128B 128C 128D 128E 
12BE 12BF 12C0 12C1 

1601 1602 

1920 1921 1922 1923 1924 1925 1926 1927 
1928 1929 192A 192B 192C 1941 1942 1970 
1971 1972 1991 1992 1993 1994 1995 1996 
1997 1998 1999 199B 199C 199D 199E 199F 
19A0 19AD 19F3 19F4 19F5 

1A01 

FC00 FC01 FC02 FC05 FC1F FC20 FC21 FC22 
FC23 FC24 FC25 FC26 FC27 FC28 

-Tom