GMC G30 Problems by year

One of the four rear axle u-bolts can break. This can potentially lead to the spring lifting from the axle under certain rebound, braking or cornering maneuvers.

Left hand lower control arm can crack and could eventually cause the lower ball joint to separate from the control arm.

Platform trailer hitches were produced from other than pure steel. Consequently, the hitch will not withstand normal stresses.

On the involved vehicles the brake stoplight and cruise control switch which is operated by the brake pedal may have been assembled with an incorrect lubricant on the actuating plunger. This can cause the rear brake stoplights to become inoperative and the...

On the involved vehicles, an interference condition may exist between the carburetor fuel pipe assembly and the air conditioning bracket. This could eventually cause the pipe to wear through due to vibration and fuel pressure pulsation.

On the involved vehicles, the brake master cylinder may have been assembled with reservoir mounting bolts that were improperly processed. This could make these bolts brittle and subject to breaking. If breakage occurs, a brake fluid leak may develop between...

The front suspension control arms were assembled with ball joints which may contain sockets that were not properly heat-treated. This may cause the socket to wear rapidly and allow the ball joint stud to separate from the socket, causing either the left or...