GMC Yukon 2000–2006

From the manufacturer’s document

• Applies to：Applies to 2024 and prior GM passenger cars and trucks.
• Confirm：When diagnosing vibration, use the worksheet together with the Vibration Analysis - Road Testing procedure in the service information.
• Confirm：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.
• Confirm：Moving the sensor to other areas, look for the same Hz reading with the greatest amplitude.
• Confirm：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).
• Confirm：Aluminum wheel/tire runout measured on the vehicle: maximum 0.030 in (.762 mm).
• Confirm：Hub mounting surface runout: maximum 0.005 in (0.132 mm).
• Confirm：Wheel stud runout: maximum 0.010 in (0.254 mm).

From the manufacturer’s document

• Applies to：Applies to 2025 and prior GM passenger cars and trucks equipped with an automatic transmission.
• Condition：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.
• Confirm：An indication of water in the ATF: ATF blowing out of the transmission vent tube.
• Confirm：The ATF may appear cloudy or, with extreme contamination, look like a strawberry milkshake.
• Confirm：There may be visible water in the oil pan or a milky white substance inside the pan area.
• Confirm：Spacer plate gaskets appear swollen or wrinkled in areas where they are not compressed.
• Confirm：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.
• Confirm：Obtain the Gly-Tek test kit from the Nelco Company and test the ATF to decide accurately whether the radiator needs to be replaced.
• Repair：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.
• Repair：Thoroughly clean and rebuild the transmission, using new gaskets and oil filter.
• Repair：Flush and flow check the transmission oil cooler using J-45096.
• Repair：Thoroughly inspect the engine cooling system and hoses and clean/repair as necessary.

From the manufacturer’s document

• Applies to：Applies to 2006-2015 GM passenger cars and light duty trucks.
• Condition：Vibration is felt in the steering wheel or the seat, centered at a frequency of 10-14 Hz, between 93-115 km/h (58-72 mph).
• Caution：First order tire/wheel vibration may be misdiagnosed as tire/wheel assembly imbalance or excessive tire radial force variation.
• Cause：Inappropriate wheel torque methods may leave the wheel and tire assembly offset when mounted, so that its mass orbits the axis of the hub and vibrates like a tire with high RFV or an imbalance.
• Cause：Improper torque may distort the brake rotor and cause variance in wheel mounting that can produce smooth road shake.
• Repair：Remove the tire and wheel assemblies, index them at least two stud positions from the previous position, and re-install them.
• Caution：Do not use torque sticks or an impact driver to tighten wheel lug nuts.
• Repair：With the wheel off the ground, install all lug nuts hand tight using only a socket.
• Repair：Snug all lug nuts in a star or criss-cross pattern with a hand wrench.
• Repair：Lower the vehicle until there is just enough contact to provide resistance, then complete torquing to specification with a torque wrench.

From the manufacturer’s document

• Applies to：Applies to all 2000 to 2026 models.
• Condition：Vehicle vibration under any of various driving conditions.
• Cause：Vibration could be caused by many various components and conditions.
• Caution：Just as a check engine light is not repaired without knowing the stored DTC, a vibration should not be repaired without knowing its frequency.
• Confirm：Drive the vehicle to verify the condition and record a Pico data file of the concern.
• Repair：Repair the vehicle using the Pico information along with any published information relevant to the vibration frequency observed.
• Caution：Bulletin 12-03-10-001B is a generic document about tire to rim orientation and the tire slipping on the rim.
• Caution：Component level vibrations such as a blower motor, brake pulsation or shudder on turns do not require a Pico file.

From the manufacturer’s document

• Applies to：Applies to 2024 and prior GM passenger cars and light duty trucks.
• Condition：The most common ride concern involving tire radial force variation is shake on smooth roads at highway speed, 105-115 km/h (65-70 mph).
• Cause：Tire related smooth road highway speed shake can be caused by three conditions: imbalance, out of round and tire force variation.
• Confirm：With the vehicle raised, center the wheels on the hub by loosening all wheel nuts and hand-tightening them while shaking the wheel, then torque to specification with a torque wrench, not a torque stick.
• Confirm：If light brake application increases the pulsation felt in the steering wheel, go to the brake-induced pulsation diagnosis in the Brakes section of the service manual.
• Confirm：A reading of 35 to 50 Hz typically indicates a first order propshaft vibration.
• Confirm：Generally a reading between 10 and 20 Hz indicates a tire/wheel vibration.
• Confirm：If vibration continues after 10 minutes of driving above 72 km/h (45 mph), temporary tire flat-spotting can be ruled out.
• Caution：On the balancer always center the wheel by the pilot bore; never use the hub-cap bore, since it is not a precision machined surface.
• Confirm：Assembly radial force variation guide: P-Metric tires on light trucks, 24 lbs (11 kg) or less.
• Confirm：Assembly radial force variation guide: LT-tires on light trucks, 35 lbs (16 kg) or less.
• Repair：If the radial runout of a tire/wheel assembly is more than 0.040 in (1.02 mm), match mount the tire to the wheel to get below 0.040 in (1.02 mm).