my Cadillac Escalade T1XX (2021-Present) makes a knocking noise when I accelerate

Symptoms

• Knocking noise audible during acceleration
• Increased vibrations felt through the steering wheel or chassis
• Possible loss of power or sluggish acceleration
• Engine misfire or rough running condition
• Check engine light may be illuminated

Diagnostic Steps

1. Scan the vehicle's OBD-II system for any error codes related to engine performance or drivetrain issues.
2. Inspect the engine mounts for signs of wear or damage that could cause excessive movement during acceleration.
3. Check the oil level and condition to ensure proper lubrication of engine components.
4. Visually inspect the exhaust system for any loose or damaged components that could produce knocking sounds.
5. Test drive the vehicle while monitoring for additional noises and checking for smooth acceleration.
6. Inspect suspension components for any wear that could contribute to noise during acceleration.

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, jack stands, and safety glasses.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect Engine Mounts

• Tools Required: Socket set.
• Remove any engine cover if necessary to access engine mounts.
• Visually inspect engine mounts for cracks, excessive wear, or separation.
• If damaged, replace with OEM engine mounts. Torque new mounts to manufacturer specifications.

3. Change Engine Oil

• Tools Required: Oil filter wrench, socket set, oil catch pan.
• Drain the engine oil using the oil catch pan and replace the oil filter.
• Refill with the manufacturer-recommended engine oil (5W-30 synthetic recommended).
• Start the engine and check for leaks.

4. Repair Exhaust System

• Tools Required: Socket set, exhaust hangers or clamps as needed.
• Inspect the exhaust system for loose or damaged components.
• Tighten any loose bolts or replace damaged hangers/clamps.
• If necessary, replace damaged sections of the exhaust pipe or muffler.

5. Inspect Suspension Components

• Tools Required: Jack stands, socket set.
• Lift the vehicle and inspect suspension components (control arms, bushings, and struts) for wear.
• Replace any worn or damaged parts, ensuring all bolts are torqued to specification.