Which is cheaper to maintain, the GMC Envoy or the GMC Envoy?

Based on 5-year routine maintenance labor at a $150/hr indie shop rate, the GMC Envoy is cheaper to maintain — about $0 less over 60,000 miles. Parts cost is not included.

What's the labor difference between the 4.2L I6 and the 4.2L I6?

Across 32 common maintenance jobs, hours vary by drivetrain and engine layout. See the side-by-side table on this page for each job's labor hours and estimated cost.

Are there any active recalls on the GMC Envoy or GMC Envoy?

The GMC Envoy has 0 open NHTSA recalls. The GMC Envoy has 0 open recalls. Recall repairs are free at any authorized dealer.

2009 GMC Envoy vs 2009 GMC Envoy — Labor Times, Costs & Recalls

Specifications

Year

2009

Engine

4.2L I6

Drivetrain

4WD

Transmission

automatic

Fuel

gas

Powertrain

Engine output, acceleration, top speed, handling, braking — and Nürburgring if either car ran one.

Horsepower

291hp

Torque

277lb-ft

0–60 mph

8.4s

Quarter Mile

16.4s @ 85 mph

Top Speed

112 mph

Skidpad

—

60–0 Braking

—

70–0 Braking

—

Curb Weight

4,650 lb

4,665 lb

Max Towing

6,200 lb

Max Payload

1,450 lb

1,468 lb

Performance specs synthesized from manufacturer figures and instrumented magazine tests (Car and Driver, Motor Trend, Road & Track). MPG from EPA fueleconomy.gov. Numbers flagged as "low confidence" by AI generation are conservative estimates from related platforms.

Achilles' Heel

Engine-specific failure modes mechanics see in the bays — with probability, typical onset mileage, and fix cost. The data Mitchell and AllData hide behind paywalls.

VEHICLE A

GMC Envoy

4.2L I6

Reliability data not yet generated

VEHICLE B

GMC Envoy

4.2L I6

6/10

1 catastrophic1 major3 moderate3 minor

The Vortec 4200 inline-6 is generally regarded as one of GM's more robust engines from this era—far more reliable than contemporary 5.3L V8 AFM/DOD engines. Most issues are age/wear-related gaskets and sensors rather than fundamental design flaws. The catastrophic head cracking is rare (under 5%) but worth mentioning. Regular maintenance and addressing cooling system issues promptly are key to longevity. Many examples exceed 200k miles with proper care.

Reliability data pending.

catastrophic5% probability

Cylinder Head Cracking (Rare but Catastrophic)

📏 120k–200k mi💵 $3,500–$6,000🏪 Shop only

The aluminum cylinder head can develop cracks between coolant passages and combustion chambers, typically between cylinders 3-4 or 4-5. Less common than on earlier Atlas engines but still documented. Can lead to hydro-lock if coolant enters cylinders.

Symptoms: coolant consumption without external leaks · white smoke from exhaust · coolant in oil (milky appearance) · overheating · misfires

major10% probability

Timing Chain Stretch (Rare but Age-Related)

📏 180k–250k mi💵 $1,200–$2,200🏪 Shop only

The timing chain can stretch with high mileage, causing timing deviation. Much less problematic than GM's V8 timing chains of this era. Usually only an issue in neglected high-mileage examples. Requires front engine disassembly to replace.

Symptoms: rattling noise on cold start · timing retarded codes · reduced power · check engine light · rough idle

moderate50% probability

Engine Cooling Fan Clutch Failure

📏 80k–140k mi💵 $200–$450🔧 DIY-friendly

Viscous fan clutch either locks up (constant roaring) or fails open (inadequate cooling). When failed open, engine can overheat in stop-and-go traffic. Critical component for maintaining proper operating temperature on this engine.

Symptoms: overheating in traffic or low speeds · fan freewheeling at all times · roaring fan noise constantly · poor A/C performance at idle

moderate40% probability

Throttle Body Actuator Failure

📏 100k–180k mi💵 $400–$800🔧 DIY-friendly

The electronic throttle body actuator motor wears out, causing reduced power mode activation. Common enough that many mechanics stock refurbished units. Drive-by-wire system has no backup throttle cable.

Symptoms: reduced power mode · P1516 code (throttle actuator control) · intermittent stalling · throttle response lag · service stabilitrak message

moderate35% probability

Intake Manifold Gasket Leak

📏 100k–180k mi💵 $500–$900🏪 Shop only

The plastic intake manifold gaskets deteriorate over time, causing external coolant leaks or internal vacuum leaks. The lower gasket particularly prone to failure. Can cause both coolant loss and drivability issues if undetected.

Symptoms: coolant leaks at front of engine · rough idle when cold · coolant smell in cabin · slow coolant loss · P0171/P0174 lean codes possible

minor75% probability

Valve Cover Gasket Oil Leak

📏 80k–150k mi💵 $300–$600🔧 DIY-friendly

The rubber valve cover gaskets deteriorate with heat cycles, causing external oil leaks. Very common on all Vortec 4200 engines. Often accompanied by spark plug tube seal failure allowing oil into plug wells.

Symptoms: oil pooling on top of engine · burning oil smell · oil drips under vehicle · visible oil seepage around valve covers

minor40% probability

Oil Pressure Sensor Leak/Failure

📏 80k–150k mi💵 $100–$250🔧 DIY-friendly

The oil pressure sending unit develops external leaks or internal electrical failures. Located on driver's side of engine block. Can cause false low-pressure warnings or actual oil loss if leaking externally.

Symptoms: oil leak from sensor area · low oil pressure warning light · fluctuating oil pressure gauge · oil drips on driveway

minor30% probability

Camshaft Position Sensor Failure

📏 90k–160k mi💵 $150–$300🔧 DIY-friendly

The camshaft position sensor fails due to heat exposure, causing no-start or stalling conditions. Common failure on these engines. Sensor is accessible and relatively easy to replace.

Symptoms: intermittent no-start · stalling while driving · rough running · P0340/P0341 codes · extended crank time

Reliability scores and issue probabilities are synthesized from manufacturer TSBs, NHTSA complaints, forum-documented patterns, and instrumented technician reports. Treat as informed estimates, not guarantees — individual vehicles vary widely with maintenance history.

Cost of Ownership

★ WINNER

5-Year Maintenance

$36,331

0.61 $/mi

5-Year Maintenance

$36,331

0.61 $/mi

Routine maintenance only. Cost = labor hours × $150/hr × estimated 5-yr frequency. Parts cost not included.

Maintenance Breakdown

Hours per common service. Lower is faster (and cheaper) at the shop.

Oil & filter change

8.0 hrs$14,880 / 5yr

Tire rotation

2.0 hrs$2,400 / 5yr

Wiper blades

3.0 hrs$1,920 / 5yr

Cabin air filter

4.0 hrs$1,875 / 5yr

Timing Chain Stretch & Guide Wear (4.2L I6)

— hrs$1,625 / 5yr

Serpentine belt

8.0 hrs$1,235 / 5yr

PCV valve

8.0 hrs$1,220 / 5yr

4L60E/4L65E Transmission Output Shaft Bearing & Bushing Wear

— hrs$927 / 5yr

Fuel filter

2.5 hrs$810 / 5yr

Front brake pads

2.0 hrs$760 / 5yr

Rear brake pads

2.0 hrs$740 / 5yr

Differential fluid

2.0 hrs$680 / 5yr

Engine air filter

2.0 hrs$660 / 5yr

Brake fluid flush

2.0 hrs$630 / 5yr

Valve cover gasket

8.0 hrs$504 / 5yr

Coolant flush

3.0 hrs$500 / 5yr

12V battery

2.0 hrs$500 / 5yr

Valve Stem Seal Failure (4.2L I6)

— hrs$420 / 5yr

Power steering flush

2.5 hrs$395 / 5yr

Intake manifold gasket

8.0 hrs$387 / 5yr

Oil pan gasket

8.0 hrs$313 / 5yr

Fuel Pump & Module Failure

— hrs$306 / 5yr

Spark plugs

1.5 hrs$305 / 5yr

Oxygen sensor

3.0 hrs$285 / 5yr

Transmission Oil Cooler Line Failure

— hrs$260 / 5yr

Transmission Mount Collapse

— hrs$228 / 5yr

Water pump

3.0 hrs$200 / 5yr

Thermostat

3.0 hrs$172 / 5yr

Alternator

2.0 hrs$150 / 5yr

Ignition coil

1.5 hrs$122 / 5yr

Crankshaft Position Sensor Failure

— hrs$122 / 5yr

Starter motor

2.0 hrs$100 / 5yr

Active Recalls

Open NHTSA Recalls

CLEAR

Open NHTSA Recalls

CLEAR

✓ Both vehicles are completely clear of open safety recalls.

Fluid Capacities

GMC Envoy

brake · ACDelco DOT 4 Brake Fluid

coolant16.00 qt · ACDelco DEX-COOL (Orange)

engine_oil7.50 qt · ACDelco dexos1 5W-30

front_diff1.50 qt · 75W-90 GL-5 Gear Oil

power_steering1.00 qt · ACDelco Power Steering Fluid

rear_diff2.00 qt · ACDelco 75W-90 Synthetic Gear Oil

transfer_case2.50 qt · ACDelco Auto-Trak II

transmission_auto11.50 qt · ACDelco Dexron VI ATF

washer3.50 qt · Windshield Washer Fluid

GMC Envoy

brake · ACDelco DOT 4 Brake Fluid

coolant16.00 qt · ACDelco DEX-COOL (Orange)

engine_oil7.50 qt · ACDelco dexos1 5W-30

front_diff1.50 qt · 75W-90 GL-5 Gear Oil

power_steering1.00 qt · ACDelco Power Steering Fluid

rear_diff2.00 qt · ACDelco 75W-90 Synthetic Gear Oil

transfer_case2.50 qt · ACDelco Auto-Trak II

transmission_auto11.50 qt · ACDelco Dexron VI ATF

washer3.50 qt · Windshield Washer Fluid

The Verdict

TOO CLOSE TO CALL

Across cost of ownership and recall count, neither vehicle pulls decisively ahead. Pick on personal preference — drivetrain, transmission feel, brand loyalty, or the engine that puts a smile on your face.

Open the full dashboard for either truck

Labor times, torque specs, fluid capacities, DTC codes, repair procedures, recalls, common platform problems.