PIP5442: Exhaust Leak, Noisy Exhaust, Rattle, Rumble and/or Noise Mid-Vehicle – 2014-2017 Cadillac Chevrolet & GMC

#PIP5442: Exhaust Leak, Noisy Exhaust, Rattle, Rumble and/or Noise Mid-Vehicle – (Nov 15, 2016)

Subject: Exhaust Leak, Noisy Exhaust, Rattle, Rumble and/or Noise Mid-Vehicle

Brand: Model: Model Year: VIN: Engine: Transmission:
from to from to
Cadillac Escalade Models 2015 2017 SOP Current 6.2 L86 All
Chevrolet Silverado 1500 2014 2017 SOP Current 4.3L LV3 5.3L L83 6.2L L86 All
Chevrolet Suburban, Tahoe 2015 2017 SOP Current 5.3L L83 All
Chevrolet Suburban 3500 2016 2017 SOP Current 6.0 L96 All
GMC Sierra 1500 2014 2017 SOP Current 4.3L LV3 5.3L L83 6.2L L86 All
GMC Yukon Models 2015 2017 SOP Current 5.3L L83 6.2L L86 All

 

Involved Region or Country North America
Additional RPO/s: N/A
Condition Some customers may comment on an exhaust leak, noisy exhaust, or noise mid-vehicle. The noise may be described as a rattle or rumble. May be most noticeable on a cold start.
Cause This condition may be caused by an unseated pipe to pipe mid-joint connection as seen below

 

unseated pipe to pipe mid-joint connection

unseated pipe to pipe mid-joint connection

 

 

Correction

pipe flares remain fully seated

pipe flares remain fully seated

Note: Ensure that the pipe flares remain fully seated to each other while tightening the clamp.

  1. Remove and discard the exhaust band (Norma) clamp.
  2. Install and position a new exhaust band (Norma) clamp to the pipe joint.
  3. Firmly push and maintain the pipes together while tightening the exhaust band (Norma) clamp bolt.Tighten the clamp bolt to 30 Nm (22 lb. ft.).

Note: After the clamp is installed, it does not need to be perpendicular to the pipe. It is acceptable to have a pipe to pipe or clamp angle.

  1. Confirm that the clamp edges (both sides and all the way around the clamp) are fully seated on the pipe.
  2. Run the engine and inspect the clamp joint to ensure there are no leaks and that the condition is corrected.

 

Parts Information

Description Part Number Qty
Clamp Asm (2.75-in) (4.3L, 5.3L) 20779889 1
Clamp Asm (3.5-in) (6.0L, 6.2L) 20779890 1

 

Warranty Information

Labor Operation Description Labor Time
4050272 Exhaust System Alignment Use Published Labor Operation Time

 

Version 1
Modified

PIP5442

https://www.nhtsa.gov/recalls?nhtsaId=10114829


 

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