Q: Van shakes, makes knocking noise - 1993 GMC G2500

asked by on

The problem with my van occurred out of the blue. I was driving the other day and was stopped in the traffic at one point. When I started accelerating to keep driving, the van shook badly. Then it ran very rough. The rest of the drive, the van kept shuddering and there was a knocking noise. The shuddering was the worst both during acceleration and deceleration. What might be the cause? What parts do I need to replace?

Hello. You will need to find out if your engine is misfiring due to an ignition part like plug wires, plugs, or distributor parts like a cap and rotor or the module. If all the tune-up maintenance is done to replace all the above parts, then it should run good. You may just have a bad cap and rotor, but the wires and plugs could be causing them to burn out. To have this checked, enlist the help of a certified technician from YourMechanic to diagnose the vibration issue and guide through repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Van shakes, makes knocking noise - 1993 GMC G2500

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Issues while shifting into park - 2011 Land Rover LR4

Hello. It sounds like the parking pawl inside the transmission might be failing. When an automatic transmission is put into park, it is mechanically shifted into neutral and the pawl will engage a gear connected to the output shaft of...

Q: Automatic Audi A4 randomly stops accelerating

The addition of the fluids is just mere coincidence and has nothing to do with the issue. If you request a diagnostic, the first thing a mechanic would do is check for any stored diagnostic trouble codes. If there are...

Q: Car running hot and has oil in water.

The water in the oil is most likely a blown bad head gasket or a cracked head or cylinder block. A coolant leak from the intake manifold gasket into the intake to the engine may also be a cause. The...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.