The 2001 GMT800 platform Yukon is mechanically solid but plagued by transmission failures, intake manifold gasket leaks, and fuel system issues that define the ownership experience past 100k miles.
4L60E/4L65E Transmission Failure
Common · high severity
Typical onset: 120,000-180,000 mi
Symptoms: slipping between 1st-2nd or 2nd-3rd shifts, delayed engagement into reverse, burnt transmission fluid smell, Check Engine light with P0700-range codes
Fix: Complete rebuild or reman replacement required, 8-12 labor hours. Sun shell failure and 3-4 clutch pack burn-up are the usual culprits. Upgrading to HD Sonnax parts during rebuild adds longevity.
Estimated cost: $2,200-3,800
Intake Manifold Gasket Failure (Vortec engines)
Common · medium severity
Typical onset: 80,000-140,000 mi
Symptoms: coolant puddle under the intake valley, white smoke on cold start, coolant loss with no external leaks, rough idle or misfire codes
Fix: Lower intake gaskets are plastic composite and fail. Requires pulling upper/lower intake, 6-8 hours labor. Use Fel-Pro or GM updated gaskets, not Dex-Cool compatible aftermarket junk.
Estimated cost: $800-1,400
Fuel Pump and Sender Unit Failure
Common · high severity
Typical onset: 100,000-150,000 mi
Symptoms: no-start condition, cranks but won't fire, stalling at operating temperature, fuel gauge reads empty when tank is full, whining noise from rear on acceleration
Fix: Pump and sender assembly in-tank replacement, 3-4 hours with tank drop. AC Delco units preferred—aftermarket pumps fail within 20k miles regularly.
Estimated cost: $650-1,100
Distributor Failure (4.8L/5.3L)
Occasional · high severity
Typical onset: 90,000-130,000 mi
Symptoms: sudden no-start, no spark, intermittent stalling, rough running and backfiring, tachometer drops to zero while driving
Fix: Optical sensor or reluctor wheel inside distributor fails. Replacement distributor and re-timing, 2-3 hours. Get AC Delco—remanufactured units have 50/50 success rate.
Estimated cost: $400-700
Front Differential Actuator and IWE System Issues (4WD)
Occasional · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: grinding noise when engaging 4WD, service 4WD light illuminated, front wheels won't engage in 4WD, clunking from front differential on turns
Fix: Thermal actuator motor or encoder motor on transfer case fails, or front axle disconnect mechanism seizes. Actuator replacement 1.5-2 hours, axle work adds 3-4 hours if internals need servicing.
Estimated cost: $350-900
EVAP Vent Valve and Purge Solenoid Failures
Common · low severity
Typical onset: 60,000-110,000 mi
Symptoms: Check Engine light with P0446, P0449, or P0455 codes, fuel smell near rear bumper, difficulty filling fuel tank, pump clicks off repeatedly, no driveability issues
Fix: Vent valve on top of fuel tank or purge solenoid near intake fails. Tank drop for vent valve 2-3 hours, purge solenoid 0.5 hour. Common emission test failure cause.
Estimated cost: $250-650
Cooling System Cascade Failures
Occasional · high severity
Typical onset: 100,000-160,000 mi
Symptoms: overheating in traffic or under load, heater blows cold at idle, coolant seeping from water pump weep hole, radiator end tanks cracking
Fix: Water pump, radiator, and hoses age out together. DexCool sludge accelerates failures. Full system overhaul: water pump 3 hours, radiator 2 hours. Do thermostat and hoses at same time.
Estimated cost: $900-1,600
Steering Shaft U-Joint Clunk
Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: clunk or knock when turning wheel at low speeds, steering wheel feels notchy, noise disappears once moving, no play in steering
Fix: Intermediate shaft U-joint wears and develops slop. Replacement shaft 1-2 hours. TSB existed but GM never recalled it despite being near-universal.
Estimated cost: $200-400
Owner tips
Flush Dex-Cool at 100k and switch to universal coolant—stops intake gasket deterioration
Change transmission fluid every 50k with Mobil 1 ATF or Valvoline MaxLife—4L60E doesn't forgive neglect
Replace fuel filter every 30k miles—keeps fuel pump alive
Use Top Tier gas exclusively—these Vortec engines carbon up injectors fast on cheap fuel
Buy one under 120k miles with documented transmission service and fresh intake gaskets—pass on high-mileage unknowns unless priced for a transmission.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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CERTAIN FEDERAL-MOGUL REPLACEMENT WHEEL HUB ASSEMBLIES WITH THE BRAND NAMES: NATIONAL, CARQUEST P/NOS. 515020, 515021, 515025, 515053, 515054, 515059, AND 515060, SHIPPED BETWEEN JANUARY 23, 2006, AND DECEMBER 20, 2007, SOLD FOR LIGHT DUTY AND MEDIUM DUTY TRUCKS. THE INBOARD RETENTION NUT USED TO MAINTAIN HUB BEARING ASSEMBLY CAN LOOSEN RESULTING IN AN ABS LIGHT INDICATION, NOISE, AND/OR WHEEL SEPARATION.
Consequence: WHEEL SEPARATION CAN RESULT IN A VEHICLE CRASH.
Remedy: FEDERAL-MOGUL WILL NOTIFY CUSTOMERS AND WILL REPLACE THE HUB ASSEMBLY FREE OF CHARGE. THE RECALL BEGAN ON FEBRUARY 7, 2008. OWNERS CAN CONTACT FEDERAL-MOGUL TOLL-FREE AT 877-489-6659.
ENGINE AND ENGINE COOLING · 07V521000
2007-11-07 · EA06016
ON CERTAIN PICKUP TRUCKS EQUIPPED WITH AN 8.1L V8 ENGINE, THE CRANKSHAFT POSITION CAN OPERATE INTERMITTENTLY OR FAIL COMPLETELY. IF THE SENSOR OPERATES INTERMITTENTLY, THE SES LIGHT MAY ILLUMINATE AND THE VEHICLE MAY RUN ROUGH. THE ENGINE MAY STALL, AND IF SO, MAY RE-START IMMEDIATELY OR AFTER A COOL DOWN PERIOD.
Consequence: IF THE SENSOR BECOMES COMPLETELY INOPERATIVE, THE ENGINE WILL QUIT RUNNING AND WILL NOT RE-START. EITHER OF THESE FAILURES CAN INCREASE THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE CRANKSHAFT POSITION SENSOR FREE OF CHARGE. THE RECALL BEGAN ON DECEMBER 18, 2007. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438 AND GMC AT 1-866-996-9463.
FUEL SYSTEM, GASOLINE · 06E043000
2006-05-19
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18, 2005, THROUGH MARCH 21, 2006, SOLD FOR USE ON THE VEHICLES LISTED ABOVE AND ON CERTAIN SCHOOL BUSES. (TO SEE THE SCHOOL BUS ENGINE SIZES, CLICK ON "DOCUMENT SEARCH" AND THEN "BUS APPLICATIONS"). THE CONNECTOR ON THE FUEL FILTER WAS NOT MANUFACTURED TO HONEYWELL'S SPECIFICATION. AS A RESULT, THE O-RING MAY NOT SEAT CORRECTLY ON THE FUEL LINE.
Consequence: THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. IN THE PRESENCE OF AN IGNITION SOURCE, A FIRE COULD OCCUR.
Remedy: HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 18, 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION 1).
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP · 05V379000
2005-08-29 · PE05020
CERTAIN PICKUP TRUCKS AND SPORT UTILITY VEHICLES MAY EXPERIENCE UNWANTED ANTILOCK BRAKE SYSTEM (ABS) ACTIVATION. THIS CONDITION IS MORE LIKELY TO OCCUR IN ENVIRONMENTALLY CORROSIVE AREAS. THIS RECALL WILL BE LAUNCHED IN THE "SALT BELT" STATES OF CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MARYLAND, MASSACHUSETTS, MAINE, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN AND THE DISTRICT OF COLUMBIA ONLY.
Consequence: THIS CAN CAUSE INCREASED STOPPING DISTANCES DURING LOW-SPEED BRAKE APPLICATIONS, WHICH COULD RESULT IN A CRASH.
Remedy: DEALERS ARE TO REMOVE THE WHEEL SPEED SENSOR AND THOROUGHLY CLEAN THE WHEEL SPEED SENSOR MOUNTING SURFACE ON THE BEARING, APPLY RUST INHIBITOR TO THE CLEANED SURFACE, GREASE THE MOUNTING SURFACE, REINSTALL THE WHEEL SPEED SENSOR, AND CHECK THE PEAK-TO-PEAK OUTPUT VOLTAGE TO ENSURE THE WHEEL SPEED SIGNAL IS WITHIN SPECIFICATIONS. THE RECALL BEGAN SEPTEMBER 22, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438 OR GMC AT 1-866-996-9463.
STRUCTURE · 03V094000
2003-03-07
CERTAIN PICKUP TRUCK, VAN, AND MINI VAN CONVERSIONS EQUIPPED WITH SOUTHERN COMFORT BUILT RUNNING BOARDS THAT CONTAIN CERTAIN COURTESY LIGHTS MANUFACTURED BY AMERICAN TECHNOLOGY COMPONENTS, INC. THESE UNITS CONTAIN A COURTESY LIGHT OR LIGHTS THAT MIGHT OVERHEAT WHEN THE WIRE HARNESS IS EXPOSED TO EXCESSIVE MOISTURE AND ROAD SALT.
Consequence: THIS OVERHEATING CONDITION CAN CAUSE THE RUNNING BOARD TO MELT OR CAUSE A FIRE.
Remedy: DEALERS WILL REPLACE THE WIRING HARNESS ON THESE RUNNING BOARDS. OWNER NOTIFICATION BEGAN MARCH 7, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT SOUTHERN COMFORT AT 1-800-745-6096.
SEATS:FRONT ASSEMBLY:HEAD RESTRAINT · 02V253000
2002-09-17
ON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH REARWARD FOLDING HEAD RESTRAINTS ON THE SECOND ROW SEATS, TWO POTENTIAL PINCH POINTS EXIST ON EACH OF THE FOLDING HEAD RESTRAINTS WHEN THE RESTRAINTS ARE FOLDED REARWARD AS THE SEATBACK IS FOLDED DOWN.
Consequence: IF A PERSON WERE TO INSERT THEIR FINGER(S) INTO THE PINCH POINT WHEN THE HEAD RESTRAINT FOLDS, IT COULD TRAP AND PINCH THE FINGER(S) CAUSING INJURY.
Remedy: DEALERS WILL INSTALL PROTECTIVE COVERS OVER THE PINCH POINTS. OWNER NOTIFICATION BEGAN NOVEMBER 8, 2002. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020, GMC AT 1-800-462-8782, OR CADILLAC AT 1-800-458-8006.
SEAT BELTS:FRONT:RETRACTOR · 01V159000
2001-05-17
VEHICLE DESCRIPTION: PICKUP AND UTILITY TRUCKS. SOME OF THESE VEHICLES HAVE AN INTERNAL COMPONENT IN THE OUTBOARD SEAT BELT RETRACTORS FOR THE 2ND AND 3RD ROW OF SEATS THAT COULD BE CRACKED. WITH REPEATED ACTUATION OF THE LOCKING MECHANISM, THE CRACK COULD SPREAD TO THE POINT SUCH THAT THE SEAT BELT WOULD NO LONGER LOCK.
Consequence: IN A CRASH, INCREASED OCCUPANT INJURY COULD RESULT FROM THE NO-LOCK CONDITION.
Remedy: DEALERS WILL INSPECT THE OUTBOARD SEAT BELTS FOR SPECIFIC LOT NUMBERS AND REPLACE THE BELTS IF NECESSARY. GM IS ENCLOSING AN INSPECTION PROCEDURE FOR THE OWNERS TO USE OR THEY CAN HAVE THEIR DEALERS DO THE INSPECTIONS. OWNER NOTIFICATION BEGAN JULY 2, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.
STRUCTURE:BODY · 00V343000
2000-10-25
VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND SPORT UTILITY VEHICLES. SOME OF THESE VEHICLES HAVE LOOSE OR MISSING REAR WHEELHOUSE PLUGS. UNDER CERTAIN VEHICLE OPERATING CONDITIONS, EXHAUST GASES CAN FLOW FORWARD AND ACCUMULATE IN THE REAR WHEELHOUSE.
Consequence: THESE GASES COULD FLOW INTO THE PASSENGER COMPARTMENT IF THE PLUG IS MISSING OR LOOSE AND COULD CAUSE POSSIBLE ILLNESS, UNCONSCIOUSNESS, OR DEATH.
Remedy: DEALERS WILL INSPECT THE VEHICLE FOR LOOSE OR MISSING WHEELHOUSE PLUGS AND INSTALL NEW PLUGS IF NECESSARY.
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