GMC Yukon 2000–2006

Manufacturer communication2002–2006 GMC YUKON DENALI ・ 2023-05-06(3 earlier editions of this document folded here)

Diagnostic tip: valve, lifter or camshaft issue

1. 1Fault

   • Noise
   • Warning light
   • P0300
   • P0301
   • P0302
   • P0303
   • P0304
   • P0305
   • Misfire, chirp, squeak, squeal or tick noise, or MIL illuminated.
   • DTCs P0300 (engine misfire detected) and P0301 through P0308 (misfire detected on cylinders 1 through 8) are listed.
   ↓→

2. 2Finding the cause

   Possible causes

   • Possible causes: worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, or a collapsed AFM lifter.

   Steps to confirm (in the document’s order)

   1. A verified noise is not eliminated by canceling fuel injectors and occurs at camshaft speed (half of crankshaft speed).
   2. If applying pressure to the valve side of the rocker changes the noise, a lifter and/or cam lobe concern on that cylinder is most likely.
   3. Disconnect the coils and injectors on one bank, run the engine with that valve cover removed, back off the rocker arm a couple of turns and listen for a change in the noise.
   4. Measure cam lobe lift at the pushrod side of the rocker arm and compare with other rockers on the same bank; the misfiring or ticking cylinder should have clearly less lift.
   5. A good indicator of a sticking valve is misfires that keep counting on an aggressive deceleration with engine braking.

   1 more points
   ↓→

3. 3Correction

   Repair

   • If a worn camshaft lobe or lifter roller is found, replace the camshaft and all lifters, and the plastic lifter guide for the affected lifter.

   Caution

   • A damaged cam lobe is easy to overlook through the lifter bores, and unworn lifter rollers do not mean the cam lobes are okay; inspect both carefully.

Manufacturer communication2002–2006 GMC YUKON DENALI ・ 2018-11-13(1 earlier editions of this document folded here)

Service Engine Soon Lamp, Misfire, Engine Noise Diagnostic Information

1. 1Fault

   • Leak
   • Noise
   • Warning light
   • Check engine / Service Engine Soon
   • P0300
   • P0308
   • Customers may complain of an SES light, engine misfire, and/or engine noise.
   • If the SES light is on, there will be a P0300-P0308 DTC with misfires counting on a single cylinder, which may or may not be felt.
   • A verified noise is not eliminated by canceling fuel injectors and occurs at camshaft speed (half of crankshaft speed).
   ↓→

2. 2Finding the cause

   • Valve Spring: broken
   • Active Fuel Management Lifter: failed
   • Valve: defective
   • Camshaft Lobe: worn
   • Lifter Roller: worn

   Possible causes

   • If SI diagnosis does not isolate the cause, it may be a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, or a collapsed AFM (Active Fuel Management) lifter.

   Steps to confirm (in the document’s order)

   1. During the noise, press with a wooden hammer handle on the rocker arms at the valve side, push rod side, and side of the rocker to find which one is making noise.
   2. If pressure on the valve side of the rocker changes the noise, it is most likely a lifter and/or cam lobe concern on that cylinder.
   3. Measure the cam lobe lift at the push rod side of the rocker arm.
   4. A good indicator of a sticking valve is engine misfires that continue to count on an aggressive deceleration with engine braking.
   5. Release the air pressure from the cylinder and work the valve up and down in the guide while turning it 360 degrees; if any binding is felt, a stem to guide clearance concern exists.

   1 more points
   ↓→

3. 3Correction

   Repair

   1. If a worn camshaft lobe or lifter roller is found, follow SI procedures to replace the camshaft and all lifters.
   2. Also replace the plastic lifter guide for the lifter that had the damaged cam lobe and/or lifter roller.
   3. Refer to the latest version of PIP4753 for decarboning instructions.
   4. If a broken valve spring is found, replace the broken valve spring as necessary.

   Caution

   • If an AFM lifter concern is suspected, refer to the latest version of PIP4568 for additional information.

Manufacturer communication2005–2006 GMC YUKON DENALI ・ 2018-05-21

2-3 Upshift and 3-2 Downshift Clunk Normal Condition

1. 1Fault

   • Noise
   • A clunk noise can be heard on a 2-3 upshift or a 3-2 downshift.
   • The condition may be more pronounced on a 4-wheel drive vehicle because of the additional tolerances in the transfer case.
   ↓→

2. 2Finding the cause

   Possible causes

   • During a 2-3 upshift the 2-4 band is released and the 3-4 clutch is applied; the timing of this shift can momentarily reverse the torque on the output shaft, which makes the clunk.
   • The same torque reversal can occur on a 3-2 downshift, when the 3-4 clutch is released and the 2-4 band applied.
   ↓→

3. 3Correction

   Caution

   • For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin Number 05-07-30-012.
   • This is a normal condition; no repairs should be attempted.

Recall2000–2006 GMC YUKON ・ —

Wheel Hub Assembly Bearing Nut Loosening Recall

1. 1Fault

   • Noise
   • Warning light
   • ABS light
   • The inboard retention nut that maintains the hub bearing assembly can loosen, resulting in an ABS light indication, noise, and/or wheel separation from the vehicle; wheel separation can result in a vehicle crash.
   ↓→

2. 2Finding the cause

   • Inboard Retention Nut: loose or misadjusted

   Steps to confirm (in the document’s order)

   1. On 2x4 vehicles, raise the vehicle on an approved hoist first; the hub assembly is good if a yellow, green or blue paint mark is seen on the grease cap on the inboard side of the steering knuckle.
   2. If the paint mark is not present, remove the wheel and the brake rotor and clean rust from the hub assembly face to check for the date code stamping.
   3. Defective hub assemblies can be identified by the country of origin on the package together with a recalled date code, by the date code on the package, or by the date code on the hub assembly.
   4. If a round yellow sticker is present on the box label, the part is good.
   ↓→

3. 3Correction

   • Hub Assembly: replaced

   Repair

   1. The hub assemblies were manufactured for aftermarket use; owners of these parts should have them removed and replaced as soon as possible.
   2. Federal-Mogul will replace the recalled hub assemblies free of charge.

   Parts

   • The recalled part numbers are 515020, 515021, 515025, 515053, 515054, 515059 and 515060.

Recall2000 GMC YUKON ・ 2001-02-01

Tire Tread Separation on Wilderness LE Tires

1. 1Fault

   • Noise
   • Tyre failure (blowout, tread separation)
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   • Tire: failed
   ↓→

3. 3Correction

   • Tire: replaced

Recall2000–2005 GMC YUKON ・ —

Fram Replacement Fuel Filters (P/N G3727) Recall

1. 1Fault

   • Leak
   • Noise
   • Smoke or fire
   • The connector on the fuel filter was not manufactured to specification, so the O-ring may not seat correctly on the fuel line; this may cause an inadequate seal, potentially leading to a fuel leak (wetting or dripping) and possible vehicle fire.
   ↓→

2. 2Finding the cause

   • Fuel Filter Connector: design or manufacturing
   • O-Ring: loose or misadjusted

   Steps to confirm (in the document’s order)

   • The part number (G3727), country of origin (Mexico) and the date code (e.g., X60031) are located on the side of the fuel filter.
   ↓→

3. 3Correction

   • Fuel Filter: replaced

   Repair

   • Honeywell will replace the subject fuel filters at no charge to the customer.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2018-08-20

Light Duty Trucks: Grinding Noise in Park with 4WD Low

1. 1Fault

   • Noise
   • Light duty trucks with automatic transmission and 4 wheel drive may make a grinding/ratcheting noise when the transmission is shifted into park while the transfer case is in 4 wheel drive low (4LO) range.
   • The grind/ratchet noise lasts approximately one second.
   ↓→

2. 2Finding the cause

   Possible causes

   • When the transmission is shifted from drive or reverse into park with the transfer case in 4LO, the driveline unloads and turns the propeller shaft approximately 1/8 of a turn.
   • The gear reduction in the transfer case makes the transmission output shaft turn faster than the parking pawl will hold, so the parking pawl grinds/ratchets until the output shaft stops.
   ↓→

3. 3Correction

   Caution

   • This should be considered characteristic of 4 wheel drive vehicles operated in 4LO.
   • Replacing transmission, transfer case and/or driveline components will not resolve the concern; shifting into park with the transfer case in the 4HI or 2HI range is recommended.

Recall2003–2004 GMC YUKON ・ 2004-04-02

Brake Hydro-Boost Housing Relief Valve Bore Recall

1. 1Fault

   • Noise
   • The relief valve bore in the brake hydro-boost module may be out of specification, which could fracture the relief valve o-ring seal inside the module.
   • If the seal fractures, the driver may hear during braking an engine compartment noise like the one made when the steering wheel is turned to a full stop, and may feel slightly higher steering effort while braking and parking.
   • Under certain driving conditions a fractured seal may require slightly more brake pedal effort for the same deceleration, which could result in a crash without prior warning.
   ↓→

2. 2Finding the cause

   • Hydro-Boost Relief Valve Bore: design or manufacturing

   Possible causes

   • Inspection found a machining error in the relief bore cavity of modules produced on one of the automated boring machines used for the base housing.

   Steps to confirm (in the document’s order)

   1. Look at the color of the relief valve: if it is metallic yellow or looks like brass, no further action is required.
   2. If a yellow, pink or white paint mark is visible, no further inspection or repair is required, and any stamped number is to be disregarded.
   3. With no paint marks and a stamped number 2, 3 or 4 visible, no further inspection or repair is required.
   4. If a stamped number 1 is visible on the machined surface, the relief valve must be replaced.
   ↓→

3. 3Correction

   • Hydro-Boost Relief Valve: replaced

   Repair

   1. With the ignition OFF, pump the brake pedal at least ten times.
   2. Unscrew the original relief valve from the hydraulic brake booster with the tool supplied with the new relief valve.
   3. Insert the new relief valve into the bore and tighten it to 17 N·m (13 lb ft).
   4. With the master cylinder mounted flush to the booster, install the nuts and tighten them to 33 N·m (24 lb ft).

   Parts

   • Part number 10398682, VALVE KIT, P/B BOOS CONT, quantity 1 per vehicle if required.

   Part numbers printed in the document

   • 10398682Look up at RockAuto (aftermarket candidates) ↗Search the web ↗

   The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

   Caution

   • Take care when working around the accumulator, which contains high-pressure compressed gas and hydraulic fluid.
   • Do not blow compressed air into the bore or flush the valve bore with commercially available cleaners; this could damage the booster or master cylinder.

Owner complaint2000 GMC YUKON ・ 2004-05-06

Parking brake issue with scraping noise from rear

1. 1Fault

   • Noise
   • Parking brake
   ↓→

2. 2Finding the cause

   • Brake Component: design or manufacturing
   • Parking Brake Shoe: worn
   ↓→

3. 3Correction

   Not stated

   What the documents say to do

   Parking brake linings worn out prematurely, parking brake does not hold (PBR single-shoe drum-in-hat)

   Confirm

   • On complaint vehicles examined in the field, wear occurred earlier and to a greater extent on the driver's side parking brake unit and was largely localized at the tip of one of the linings.

   Repair

   1. A revised clip designed to exert less force on the shoe went into MY 2003 production and into the service part stream. Installing the newer clip and replacing worn linings has been shown to remedy the defect.
   2. The closing report lists a bulletin of Aug 2004 as 02-05-26-001B "Brakes - Parking Brake Shoe Retainer Clip Availability", announcing a new retainer clip service kit for DIH-equipped vehicles.

   Caution

   • The vehicles warn the operator with a chime if driven over 3 mph (= 4.83 km/h) with the parking brake engaged.

Owner complaint2002 GMC YUKON DENALI ・ 2003-06-11

Intermittent noise from right rear of vehicle; returned after exhaust system change

1. 1Fault

   • Noise
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Exhaust System: replaced (says it held for a while)

Manufacturer communication2006 GMC YUKON ・ 2019-09-16

Low or No Oil Pressure and Engine Noise Service Information

1. 1Fault

   • Noise
   • Oil pressure warning
   • P0521
   • Customers may complain of low oil pressure, no oil pressure and/or engine noise, possibly with P0521, which may result from a sticking oil pump pressure relief valve.
   • It may be intermittent if the valve frees up when the engine cools down.
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Oil Cooler Line: cleaned
   • Oil Pump: replaced

   Repair

   1. If SI diagnosis isolates low mechanical oil pressure at the oil filter housing and oil pressure sensor, replace the oil pump and flush the oil cooler lines (if equipped).
   2. Clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.

   Caution

   • If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.

Manufacturer communication2001–2006 GMC YUKON DENALI ・ 2018-06-04

Engine Squealing Type Noise on Start-up or Vibration

1. 1Fault

   • Noise
   • Vibration or shudder
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   Repair

   • Inspect the crankshaft balancer for an outer ring slipping on the center hub; if found, replace the crankshaft balancer.

Owner complaint2003 GMC YUKON ・ 2006-01-03

Screeching noise from rear during turns and four-wheel drive engagement

1. 1Fault

   • Noise
   ↓→

2. 2Finding the cause

   THIS COULD POSSIBLY BE THE CULPRIT OF THE SCREECHING NOISE WHEN TURNING.

   ↓→

3. 3Correction

   • Tire: adjusted
   • Four Wheel Drive System: repaired

Manufacturer communication2000–2006 GMC YUKON ・ 2022-10-17(2 earlier editions of this document folded here)

Torque Converter Bolt Removal Warning

1. 1Fault

   • Noise
   • Noise from underneath a vehicle equipped with an automatic transmission.
   ↓→

2. 2Finding the cause

   Possible causes

   • Running the engine with those bolts removed may damage the pilot on the front of the torque converter, the pilot hole in the end of the crankshaft, or both.

   Steps to confirm (in the document’s order)

   • Use chassis ears to isolate the component or assembly that is the loudest source of the noise.
   ↓→

3. 3Correction

   Caution

   • Do not remove the flex plate to torque converter bolts, push the converter back toward the transmission and start the engine to tell whether the noise is from the engine or the transmission.

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2022-09-19

Flexplate and Torque Converter Separation Warning

1. 1Fault

   • Noise
   • A noise comes from underneath a vehicle equipped with an automatic transmission.
   • The technician may find that the noise comes from the bell housing area.
   ↓→

2. 2Finding the cause

   Possible causes

   • Running the engine with those bolts removed may damage the pilot on the front of the torque converter, the pilot hole in the end of the crankshaft, or both.

   Steps to confirm (in the document’s order)

   • Use chassis ears to isolate the component or assembly that is the loudest source of the noise.
   ↓→

3. 3Correction

   Caution

   • Do not separate the torque converter from the flex plate.
   • Do not remove the flex plate to torque converter bolts, push the converter back and start the engine to tell whether the noise is from the engine or the transmission.

Manufacturer communication2000–2006 GMC YUKON ・ 2023-08-21(2 earlier editions of this document folded here)

Unusual Noise Diagnosis - Preliminary Information

1. 1Fault

   • Noise
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   • For an unusual noise that is hard to identify or pinpoint, record a sound or video file of the noise before disassembly and before calling Technical Assistance.
   ↓→

3. 3Correction

   This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.Â

Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2018-04-02

Technical Bulletin Revision for 2013-2014 Model Years

1. 1Fault

   • Noise
   • On automatic transmission vehicles, a clunk noise when shifting between Park and Drive, Park and Reverse, or Drive and Reverse.
   • A clunk noise while driving when the accelerator is quickly depressed and then released.
   ↓→

2. 2Finding the cause

   Possible causes

   • Gear clearance or freeplay (lash) can produce a clunk whenever a gear is loaded and unloaded quickly or the direction of rotation is reversed.
   • In a 4-wheel drive vehicle the transfer case gears and their clearances add freeplay on top of that from the rear axle gears, universal joints and transmission.

   Steps to confirm (in the document’s order)

   • Compare the complaint vehicle with a like vehicle; if the results are the same, it is a normal condition.
   ↓→

3. 3Correction

   Caution

   • Because every driveline component has some lash by design, changing driveline components may not reduce the lash satisfactorily.
   • The clunk noise does not adversely affect durability or performance.
   • Do not confuse this with the clunk at stop or from launch that is handled by cleaning/lubricating the rear propshaft slip yoke splines (Corporate Bulletin Number 09-04-21-003D or later).

Owner complaint2003 GMC YUKON ・ 2006-06-19

Brake squealing noise; accident on wet roads due to brake failure

1. 1Fault

   • Air bag did not deploy
   • Reduced braking
   • Noise
   • Seat belt
   ↓→

2. 2Finding the cause

   • Evap Vent Valve: failed
   ↓→

3. 3CorrectionNot repaired

   ADDITIONAL REPAIRS STILL NEED TO BE MADE TO BRAKES AND AIRBAGS.

Recall2003–2004 GMC YUKON ・ 2004-01-29

Brake hydro-boost module relief valve o-ring seal failure

1. 1Fault

   • Noise
   ↓→

2. 2Finding the cause

   • Relief Valve O-Ring Seal: failed
   ↓→

3. 3Correction

   Not stated

Owner complaint2005 GMC YUKON ・ 2009-02-26

Loud grinding/slipping feeling during braking, from front end

1. 1Fault

   • Noise
   • Shifting fault
   ↓→

2. 2Finding the cause

   Not stated

   ↓→

3. 3Correction

   • Rear Brake: replaced (says it held for a while)

Manufacturer communication2006 GMC YUKON DENALI ・ 2020-08-10(1 earlier editions of this document folded here)

Power Steering Noise at Low Temperatures - Technical Bulletin

1. 1Fault

   • Leak
   • Noise
   • Noise or a fluid leak from the power steering pump, gear or high pressure side hose during extreme low outdoor temperature operation.
   ↓→

2. 2Finding the cause

   Possible causes

   • At -30°C (-22°F) or lower the power steering fluid may thicken and system pressures may rise, potentially causing noise or damage to components.
   ↓→

3. 3Correction

   Repair

   • Replace any damaged power steering components, flush the system and refill with Cold Climate power steering fluid.

   Parts

   • P/N 12345866 (in Canada 10953484): 16 oz. bottle Power Steering Fluid - Cold Climate.
   • P/N 12345867 (in Canada 10953471): 32 oz. bottle Power Steering Fluid - Cold Climate.

   Part numbers printed in the document

   • 12345866Fluid,P/S Cold Climate Acdelco 16OzLook up at RockAuto (aftermarket candidates) ↗Search the web ↗

     No successor statedas stated by GMPartsGiant (checked 2026-10-06) ↗

   • 10953484Look up at RockAuto (aftermarket candidates) ↗Search the web ↗

   • 12345867Fluid,P/S Cold Climate Acdelco 32OzLook up at RockAuto (aftermarket candidates) ↗Search the web ↗

     No successor statedas stated by GMPartsGiant (checked 2026-10-06) ↗

   • 10953471Look up at RockAuto (aftermarket candidates) ↗Search the web ↗

   The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

   Caution

   • In some extreme operating conditions this fluid may not correct the condition.

Manufacturer communication2003–2006 GMC YUKON DENALI ・ 2022-06-13

Tire Pressure Service Information

1. 1Fault

   • Noise
   • Tire pressure warning
   • Ride, handling and road noise concerns may be caused by improperly adjusted tire pressure.
   • During cold weather the Tire Pressure Monitor (TPM) indicator (a yellow horseshoe with an exclamation point) may illuminate.
   ↓→

2. 2Finding the cause

   Steps to confirm (in the document’s order)

   1. The first step in diagnosing these concerns is to verify that the tires are inflated to the correct pressures.
   2. The tire placard is on the driver's side front or rear door edge, the center pillar, or the rear compartment lid.
   3. Generally a 5.6°C (10°F) temperature change equals a 6.9 kPa (1 psi) tire pressure change.
   4. A "cold" tire is one that has sat for at least 3 hours or been driven no more than 1.6 km (1 mi).
   ↓→

3. 3Correction

   Repair

   • If the indicator goes off after the tires warm up, reset the pressure to placard pressure at the cold temperature.

   Caution

   • The recommended inflation pressure is not the pressure printed on the tire sidewall.
   • Always inspect and adjust the pressure when the tires are cold.
   • Vehicles with different front and rear pressures need to be adjusted after tire rotation.
   • To prevent electrostatic discharge damage to the Tire Pressure Monitoring Sensor (TPMS), the technician should be statically discharged before checking or filling tires.

Manufacturer communication2005–2006 GMC YUKON ・ 2022-07-25(4 earlier editions of this document folded here)

Sunroof Operation Concerns – Diagnostic Information

1. 1Fault

   • Leak
   • Noise
   • Customers may comment on intermittent sunroof operation, bind, noise, auto-reverse and/or water leaks.
   ↓→

2. 2Finding the cause

   Possible causes

   • Dirt and debris may collect on the sunroof seal or in the tracks and affect operation, cause noise or plug the water drainage system.
   ↓→

3. 3Correction

   Repair

   1. Open the sunroof, remove any obstacles or loose debris, and verify that the module drain holes are not plugged.
   2. Wipe the sunroof seal and roof sealing area with a clean cloth, mild soap and water; do not remove grease from the sunroof.

   Caution

   • Some replaced sunroof module assemblies were tested and found that simple cleaning of these areas would have repaired the condition without replacing the assembly.