| Part | Manufacturer | OEM Part # | Price | Notes |
| Valve Body Gasket Kit |
| 3T40 |
| Gasket | GMO | 8652506 | 6.75 | Contact Dealer for most current part and price information. |
| 4T40E |
| Valve Body Gasket | GMO | 27207387 | 0.00 | |
| Pan Gasket |
| 4T40E | GMO | 24203590 | 49.99 | For Oil Pan Gaskets Not Listed Use RTV Sealant |
| 3T40 | GMO | 8678168 | 17.86 | Contact Dealer for most current part and price information. |
| Case Cover Gasket |
| 4T40E |
| Cover Gasket | GMO | 24201096 | 48.72 | |
| 3T40 |
| Gasket | GMO | 8678169 | 13.58 | |
| Torque Converter Seal |
| 4T40E |
| Oil Seal | GMO | 8685515 | 8.48 | |
| Gasket & Seal Kit |
| 3T40 | GMO | 8631914 | 126.26 | Contact Dealer for most current part and price information. |
| Seal Kit |
| 4T40E | GMO | 24226607 | 194.45 | |