| CHEVROLET - GMC FRONT DRIVE SHAFT | |||||
| 1966-69 | BLAZER, K10 1/2 TON & 3/4 TON | A | 23.25 | 11 9/32 | 12-501 |
| 1969-72 | BLAZER, JIMMY, K10 & K20 | A | 26.094 | 14 9/32 | 12-502 |
| 1973-76 | BLAZER, JIMMY, K10, K15 K20 & K25 | ||||
| 250 ENGINE PART TIME 4WD | A | 24.625 | 12 13/16 | 12-503 | |
| 350 ENGINE FULL TIME 4WD | A | 27.875 | 16 1/16 | 12-504 | |
| 1977 | BLAZER, JIMMY, K10, K15, K20 & K25 | A | 24.625 | 12 13/16 | 12-503 |
| K30 4 SPEED TRANSMISSION | A | 23.156 | 11 11/32 | 12-506 | |
| K30 AUTOMATIC TRANSMISSION | A | 29 | 17 3/16 | 12-507 | |
| 1977-80 | BLAZER, JIMMY, K10, K15, K20 & K25 | ||||
| PART TIME 4WD | B | 10 1/4 | 12-508 | ||
| FULL TIME 4WD | B | 13 5/8 | 12-509 | ||
| 1978-79 | K20 3/4 TON WITH AUTOMATIC TRANSMISSION | B | 16 1/8 | 12-510 | |
| 1981-90 | BLAZER, JIMMY, K10, K15, K20 & K25 | B | 16 1/8 | 12-510 | |
| 1980-90 | K30 AUTOMATIC TRANSMISSION | B | 12 3/8 | 12-511 | |
| 1980-90 | K30 MANUAL TRANSMISSION | B | 9 1/8 | 12-512 |