| Model | Year | Condition | Remarks |
| silverado | 2005 | Known good | Occasional misfires on takeoff from a stop when hot. All OEM except spark plugs |
| Sierra | 2000 | Unknown | Runs well, idle a bit rough |
| Sierra | 2003 | Lack of power | None |
| Suburban | 2007 | Known good | None |
| avalanche | 2004 | Known good | None |
| Escalade | 2004 | Unknown | None |
| silverado | 2006 | Known good | New bank 2 sensor 2 o2 |
| avalanche | 2004 | misfire | None |
| Suburban | 2005 | Poor idle quality | None |
| Suburban | 2005 | Unknown | None |