With a 4:10 rear, probably be "adequate" for the 9000 lb load, but a bit shy for 14000 - the specs show a 4:30 rear with a 6.8 to reach 14000.

<table align="right" border="0" cellpadding="0" cellspacing="0" width="610"><tbody><tr><td class="dataHead" bgcolor="#cccccc" width="129">
</td> <td width="2"> </td> <td class="dataHead" align="center" bgcolor="#dddddd">Max towing
capacity,
properly
equipped </td> <td class="dataHead" align="center" valign="top">Maximum
GCWR </td> <td colspan="10"> </td> </tr> <tr> <td colspan="14" bgcolor="#000000" height="2">
</td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 5.4L, 3.73:1 axle</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">7800</td> <td class="data" align="center">13,500</td> <td colspan="10"> </td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 5.4L, 4.10:1 axle</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">9300</td> <td class="data" align="center">15,000</td> <td colspan="10"> </td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 6.8L, 3.73:1 axle</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">11,200</td> <td class="data" align="center">17,000</td> <td colspan="10"> </td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 6.8L, 4.30:1 axle
</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">14,200</td> <td class="data" align="center">20,000</td> <td colspan="10"> </td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 6.0L diesel, 3.73:1 axle</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">13,700</td> <td class="data" align="center">20,000</td> <td colspan="10"> </td> </tr> <tr> <td class="data" bgcolor="#cccccc" width="129"> 6.0L diesel, 4.10:1 axle</td> <td width="2"> </td> <td class="data" align="center" bgcolor="#dddddd">13,400
</td> <td class="data" align="center">20,000</td> <td colspan="10"> </td></tr></tbody></table>