GMC Yukon 2000–2006

Manufacturer communication2005–2006 GMC YUKON DENALI ・ 2024-06-07(4 earlier editions of this document folded here)

Water or Ethylene Glycol in Transmission Fluid

1. 1Fault

   • Vibration or shudder
   • Water or ethylene glycol in ATF changes the friction of the clutches, frequently causing shudder during engagement or gear changes, especially during torque converter clutch engagement.
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. An indication of water in the ATF: ATF blowing out of the transmission vent tube.
   2. The ATF may appear cloudy or, with extreme contamination, look like a strawberry milkshake.
   3. There may be visible water in the oil pan or a milky white substance inside the pan area.
   4. Spacer plate gaskets appear swollen or wrinkled in areas where they are not compressed.
   5. If water is found in the ATF and its source is not identified, or a leaking in-radiator transmission oil cooler is suspected, a simple and quick test kit that detects ethylene glycol in ATF is available.

   1 more points
   ↓→

3. 3Correction

   Repair

   1. If water or coolant is found in the transmission, all rubber-type seals, all composition-faced clutch plates and/or bands, all nylon parts and the torque converter must be replaced.
   2. Thoroughly clean and rebuild the transmission, using new gaskets and oil filter.
   3. Flush and flow check the transmission oil cooler using J-45096.
   4. Thoroughly inspect the engine cooling system and hoses and clean/repair as necessary.

Owner complaint2003 GMC YUKON ・ 2022-10-06

Engine stalls with battery warning light and brake pedal vibration at various speeds

1. 1Fault

   • Stalls or shuts off
   • Vibration or shudder
   • Warning light
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3CorrectionNot repaired

   The vehicle had yet to be repaired.

Manufacturer communication2006 GMC YUKON DENALI ・ 2017-12-22

Proper Wheel Installation and Torque Techniques

1. 1Fault

   • Vibration or shudder
   • Vibration may be felt in the steering wheel or seat, centered at 10-14 Hz, between 93-115 km/h (58-72 mph).
   ↓→

2. 2Finding the cause

   Possible causes

   • Inappropriate wheel torque methods may leave the wheel and tire assembly offset when mounted.
   ↓→

3. 3Correction

   Repair

   1. Remove the tire and wheel assemblies, index them at least two stud positions from the previous position, and re-install them.
   2. Step 1: with the wheel off the ground, install all lug nuts hand tight using only a socket.
   3. Step 2: snug all lug nuts in a star or criss-cross pattern with a hand wrench.
   4. Step 3: lower the vehicle until there is just enough contact to resist, then torque to specification with a torque wrench.

   Caution

   • This first order tire/wheel vibration may be misdiagnosed as assembly imbalance or excessive tire Radial Force Variation.
   • Improper torque may distort the brake rotor and vary the wheel mounting, which can cause smooth road shake.
   • Do not use torque sticks or an impact driver to tighten wheel lug nuts.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2008-04-07

Eaton Locking Differential Chatter Shudder Noise on Turns (RPO G80)

1. 1Fault

   • Noise
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Locking Rear Differential: defective
   ↓→

3. 3Correction

   EATON LOCKING DIFFERENTIAL CHATTER SHUDDER NOISE ON TURNS, EQUIPPED WITH A LOCKING REAR DIFFERENTIAL RPO G80. *NJ UPDATED 7/17/2008. *PE

Manufacturer communication2004–2006 GMC YUKON ・ 2005-11-09

Auto Trans/TCC Shudder, Water in Transmission Notice

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Transmission: clogged or contaminated
   • Torque Converter Clutch: failed
   ↓→

3. 3Correction

   4L60-E/4L65-E AUTOMATIC TRANSMISSION/TORQUE CONVERTER CLUTCH (TCC) SHUDDER, WATER IN TRANSMISSION. *TT

Manufacturer communication2000–2005 GMC YUKON ・ 2005-04-21

4WD Models with Noise, Vibration on Dry Pavement

1. 1Fault

   • Noise
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   4WD MODELS WITH NOISE, VIBRATION ON DRY PAVEMENT. *EH

Manufacturer communication2003–2005 GMC YUKON ・ 2004-11-05

Shudder or Bind on Turns in 4 HI

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   4485 4484 SHUDDER OR BIND ON TURNS IN 4 HI. *SC

Manufacturer communication2000–2005 GMC YUKON DENALI ・ 2004-11-03

NVG149 NP3 Transfer Case Bind or Shudder on Turns

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Transfer Case: defective
   ↓→

3. 3Correction

   NVG149 NP3 TRANSFER CASE MAY EXHIBIT A BIND OR SHUDDER ON TURNS. *TC

Manufacturer communication2000–2002 GMC YUKON ・ 2004-08-23

NVG Transfer Case Vibration/Shudder at Low Speed Turns

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Transfer Case: defective
   ↓→

3. 3Correction

   THE NVG 136 ALL WHEEL DRIVE (AWD) TRANSFER CASE AND THE 236 AND 246 NVG SELECTABLE TRANSFER CASES OPERATING IN THE AUTO MODE MAY EXHIBIT A CONDITION OF A VIBRATION/SHUDDER DURING LOW SPEED TURNS SUCH AS A PARKING LOT MANEUVER, UP TO APPROXIMATELY 5 MPH (= 8.05 km/h). *TT 3012A NOT YET RECEIVED. *TT

Manufacturer communication2000–2001 GMC YUKON ・ 2003-11-22

NVG 136, 236, and 246 Transfer Cases Shudder on Turns

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Transfer Case: defective
   ↓→

3. 3Correction

   THE NVG 136 ALL WHEEL DRIVE (AWD) TRANSFER CASE AND THE 236 AND 246 NVG SELECTABLE TRANSFER CASE SHUDDER ON TURNS. *TT

Manufacturer communication2000–2002 GMC YUKON ・ 2003-04-15

4-Wheel Drive Slips, Noise, Vibration, Leaks, Hot Odor Notice

1. 1Fault

   • Leak
   • Noise
   • Shifting fault
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   SLIPS IN 4-WHEEL DRIVE, NOISE, VIBRATION, LEAKS, HOT ODOR. *TT

Manufacturer communication2000–2002 GMC YUKON ・ 2002-10-10

4-Wheel Drive Transfer Case Performance Issues Communication

1. 1Fault

   • Noise
   • Shifting fault
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Transmission: failed
   ↓→

3. 3Correction

   SOME VEHICLES WILL NOT MOVE WHEN 4-WHEEL DRIVE IS REQUESTED, NOISE, SHUDDER, POOR PERFORMANCE, TRANSMISSION / TRANSFER CASE SLIPS, TRANSMISSION WILL NOT UPSHIFT, SLIPS IN 4-WHEEL DRIVE. *TT

Owner complaint2000 GMC YUKON ・ 2001-11-20

Driveshaft unbalanced and shaking at speeds over 45 MPH

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Driveshaft: defective
   ↓→

3. 3CorrectionNot repaired

   TO THIS DATE 11/20/01 I AM STILL AWAITING WORD FROM DAVE AT COURTESY ON WHEN A NEW PART WILL ARRIVE AND REPAIRS WILL BE PREFORMED.

Manufacturer communication2004–2006 GMC YUKON DENALI ・ 2023-11-22

Vibration Analysis Worksheet Service Bulletin

1. 1Fault

   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. When diagnosing vibration, use the worksheet together with the Vibration Analysis - Road Testing procedure in the service information.
   2. Place the sensor where the vibration is felt: on the seat track for a seat complaint, on the steering column for a steering wheel complaint.
   3. Moving the sensor to other areas, look for the same Hz reading with the greatest amplitude.
   4. If a system balance was attempted and the vibration remains, check ring gear backlash at each tooth; readings should not vary more than 0.050 mm (0.002 in).
   5. Aluminum wheel/tire runout measured on the vehicle: maximum 0.030 in (.762 mm).

   2 more points
   ↓→

3. 3Correction

   This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.