The K10 is a 4x4 4wd and the c10 is 2wd. If you have a 4wd K10 the picture indicates they will not fit. I would recommend buying headers locally so you can take them back if they don't fit vs having to try and mail them back. You also need to check on return policies, some places will not let you return headers. Also, buying headers via online could result in getting headers in poor condition either from rough shipping or from getting a set that was returned.