Table 1 shows one common vehicle speed control related problems of the 2013 GMC Yukon.
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control problems |
The hydraulic lifters �afm� collapsed, lifter was in locked position causing lifter to tap on camshaft, by taping on camshaft caused DE-lamentation of hardening on camshaft, which damaged camshaft and lifters. The acceleration and DE-acceleration of the vehicle became a major safety issue. The vehicle went from v-8 mode to v-4 mode, this abrupt reduction in speed would happen and did happen while driving on major roads in the city. Because the v-8 lifters would shut the cylinders off, v-8 mode would stay in locked down position causing vehicle to almost come to a complete stop.