This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
full bulletin at NHTSA ↗2005 GMC Yukon XL engine problems
moderate 12 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
12
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 12 engine complaints filed for the 2005 GMC Yukon XL, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA engine complaint has been filed on this vehicle in over 15 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
full bulletin at NHTSA ↗This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
full bulletin at NHTSA ↗This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The most consistent complaint is broken or fractured exhaust manifold bolts. Multiple owners report studs rattling out, bolt heads snapping off, or bolts fracturing inside the head casting. This failure happens across the engine lineup (4.8L, 5.3L, 6.0L) and strikes vehicles between 67,000 and 170,000 miles. The result is an exhaust leak that produces a flapping noise, raw exhaust fumes in the cabin, engine check lights, and—according to one owner—a fire hazard. When bolts snap inside the head, repair costs balloon to $2,500+ for engine removal and machine shop extraction. GM issued replacement bolts as a remedy, but it requires a dealership visit and is not a formal recall. Extended warranty has refused coverage on at least one manifold bolt failure.
Less common but serious: one owner reported unexplained engine stalls at random speeds (30–70 mph) with no fault codes, loss of brakes and steering when the engine cut out, and recurrence even after dealer fuel pressure testing. Another reported sudden power loss at 70 mph on a freeway. One 2007 incident involved transmission fluid and coolant mixing after routine maintenance, requiring $2,100 in cooling system and radiator overhaul—dealer advised purchasing a new vehicle rather than fixing the transmission damage.
Failure modes owners describe
Exhaust manifold bolt failure
Exhaust manifold bolts and studs break, fracture, or corrode, causing exhaust leaks. Owners report bolts snapping off completely, stud threads rattling out, or bolt heads fracturing. Multiple bolts can fail on a single engine. Bolts can break inside the head casting, requiring engine removal for extraction.
When: Typically 67,000–170,000 miles; owners report it as a widespread issue affecting 1999–2007 GM engines (4.8L, 5.3L, 5.7L, 6.0L)
Symptoms owners cite: Flapping noise from exhaust; Exhaust fumes inside cabin; Raw exhaust smell; Engine check light; Visible exhaust leak at manifold; Dangerous condition if manifold fully separates while driving
Codes mentioned: Engine light/MIL
Repairs/costs cited: Broken bolts require removal and replacement; if bolts snap inside head, engine removal and machine shop extraction needed (reported costs $2,500 for extraction alone). Exterior bolts can sometimes be drilled out; interior bolts require head removal.
Recalls/TSBs owners mention: GM issued replacement bolts for this problem, but only covers owners who visit dealerships; no official recall documented in these narratives. Extended warranty refused coverage in at least one case.
Engine stall while driving
Engine unexpectedly shuts off without warning while vehicle is in motion, occurring at random speeds and intervals. Engine restarts after ignition is cycled, but incidents recur. Issue does not produce fault codes and remains undiagnosed despite dealership testing.
When: Random occurrences; timing and distance since start-up vary (from minutes to three hours of driving)
Symptoms owners cite: Engine shuts off without warning; Loss of power brakes; Loss of power steering; Engine restarts after ignition cycling; No fault codes present
Repairs/costs cited: Dealership fuel pressure testing (stationary and driving) found no issues. No repair documented.
Engine hesitation/jerking on acceleration
Vehicle jumps or hesitates when accelerating from a stop, reported as a recurring issue that was dismissed as normal for a new vehicle. Later associated with engine light and burning smell.
When: Reported from October 2004 (shortly after purchase); pattern ongoing
Symptoms owners cite: Jumping/jerking motion when accelerating from stop; Engine check light; Burning smell
Repairs/costs cited: Dealership attributed engine light to loose gas cap; jumping issue remained unresolved.
Transmission and coolant system failure (cross-contamination)
Transmission fluid and radiator coolant mixed together, necessitating replacement of radiator, hoses (upper, lower, heater, bypass), thermostat, coolant jug, and extensive engine block flush. Incident occurred shortly after routine maintenance inspection.
When: At 2 years of age (March 2007); routine maintenance inspection completed January 2007 with no issues noted
Symptoms owners cite: Transmission hot warning message; Transmission and coolant fluid mixing
Repairs/costs cited: Replaced radiator, upper and lower radiator hoses, heater hoses, coolant jug, thermostat, bypass hose; extensive engine block cooling flush. Total cost $2,100. Transmission showed slight damage but dealer advised against replacement.
Recalls/TSBs owners mention: GMC indicated no recalls; dealer advised customer to plan for new vehicle rather than repair transmission.
Reduced engine power on highway
Vehicle lost power suddenly on freeway at highway speed, engine output reduced, vehicle slowed to 20 mph with traffic around.
When: Speed 70 mph on freeway
Symptoms owners cite: Reduced engine power message displayed; Sudden loss of power; Vehicle slowing to dangerous speed with traffic
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
1999 to present 4.8,5.3 5.7,6.0 liter engines from gm have inferior grade metal in the exhaust manifold bolts causing them to break. The vehicles will have exhaust leaks and false readings to the oxygen sensors.the exhaust leaks of raw exhaust gases in to the atmosphere translate to extra pollution into the atmosphere from all these vehicles . The other matter is that the computer on the…
Had engine trouble with your 2005 GMC Yukon XL?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2005 GMC Yukon XL?
It's a documented issue but not catastrophic. 12 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 11 complaints that reported odometer mileage, most engine failures cluster between 68,000 and 146,000 miles, with the median around 113,000. A quarter of owners report trouble before 68,000; a quarter make it past 146,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/GMC/Yukon XL.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.