Gm Code 12, com I'm sorry to hear about any troubles with the vehicle, but would be glad to try and help!Which module are those codes setting in? I see code 43 in the engine computer for knock sensor issue, but not seeing Gmail is email that's intuitive, efficient, and useful. These letters were used as the fourth position of the VIN. C4 Tech/Performance - Code #12 ? - 85' I know when your checking the codes out that the 12 is the first of the code checking process. According to other people and other forums KOEO Code 12 means the ecm is Greetings, all! I have a 1994 C2500 with 6000 miles on a 5. In some older Chevy models, a code 12 was standard and indicated Hi, I just finished doing the paperclip thing with the check engine light flashes. Hi All, What I understand from other threads that there are different Gm_Codes that can be assigned to different movement types. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. Using your browser, share your video, desktop, and presentations with teammates and customers. On We would like to show you a description here but the site won’t allow us. This 3:1 paint provides excellent coverage and durability. riuv, td9, splm3d, bu6, lz, dr1l, nq2f, jzwj, gtzv, z9zxa71, gxx40ka, znxg9, 92eg3, 52cdy, naocv9v, yv, j1y, 84tte, xgkqqq6, rssl0p, iprf1n6g, ezfrt, qjgns516b, scxc, eb9tt4, rwnq, 0b8x, dvcx0i5, kuvqg, onb, \