This may be caused due to an unseated pipe to pipe mid-joint.
By Omar
GM Specialist
13/11/2020
Q: How do you ensure that the pipe flares remain fully seated to each other while clamping?
A:
To ensure that the pipe flares remain fully seated while clamping you must do the following: Remove and discard the exhaust band clamp, install and position a new exhaust band clamp to the pipe joint, firmly push and maintain the pipes together while tightening, confirm that the clamp edges are fully seated on the pipe, run the engine and inspect the clamp to ensure no leaks.
By Bob
GM Specialist
12/11/2020
Q: How do you fix a muffler buzz?
A:
Raise and support the vehicle, mark the position of the heat shield and straps, cut and remove the heat shield straps, position the heat shield to the muffler and install new heat shield straps on the muffler shell in the positions marked, position the strap screw heads and cut off excess strap material.
By Omar
GM Specialist
12/11/2020
Q: What causes the Pinging/popping/snapping noise from the exhaust system?
A:
The pinging/popping/snapping noise is due to the exhaust system cooling down and is normal for this exhaust system.
By Omar
GM Specialist
11/11/2020
FAQ for Other Repair Info
Q: What is the capacity of the differentials on a 2011 Yukon?
A:
The capacity of the Differential depends on what it has: the front axles take roughly 1.8 quarts while the rear axles take roughly 2.75 quarts.
Q: What happens if I use the wrong coolant?
A:
If you use an improper coolant mixture, your engine could overheat and be badly damaged.
Q: If water is found in the transmission what components must be replaced?
A:
If water is found in the transmission, the rubber seals, clutch plates and bands, nylon parts, and torque converter need to be replaced. Also, make sure to thoroughly clean the transmission/transmission case so no water is left behind.