This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
full bulletin at NHTSA ↗2006 GMC Envoy electrical problems
severe 114 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
114
Recalls
0
Avg fix
$850
2crashes
23fires
2injuries
When does it fail?
Of the 114 electrical complaints filed for the 2006 GMC Envoy, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 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
Owners have filed 114 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Electrical accounts for 19% of all owner complaints filed against this vehicle, across 12 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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.
Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.
full bulletin at NHTSA ↗This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
full bulletin at NHTSA ↗The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
full bulletin at NHTSA ↗This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The electrical system in a 2006 Envoy is a minefield. The driver-side door master switch—controlling windows, locks, and mirrors—fails intermittently, shorts out when wet, burns, and forces owners into dangerous situations where kids can open doors or windows won't operate in an emergency. GM issued recalls (12V406000, 12180, 13V248000) but dealers have stonewalled repairs, claiming parts aren't in their computer, recalls have "closed," or the vehicle has too much mileage.
The blower motor resistor melts and catches fire under the dash—we're talking actual flames and explosions. One owner's vehicle burned in the driveway at idle in below-freezing temps. Resistor replacements fail again within months, and fires occur without triggering the fuse.
The ignition switch produces low voltage, killing the engine mid-highway without warning and locking out power steering, brakes, and airbags. Owners have replaced the same switch two or three times in three years. Unlike other GM models, the Envoy isn't part of the recall.
StabiliTrak randomly engages on dry pavement, slamming the brakes and dropping speed from 70 mph to 30 mph, inviting rear-end collisions. The fuel tank sender corrodes and leaks gasoline onto the underside—a fire waiting to happen, especially in salt states. Headlights cut out at night on the freeway; repair parts are unavailable for months or years after the recall was issued. Owners report multiple failures in a single vehicle spanning different electrical subsystems—a sign of broader design issues, not isolated defects.
Same GMC Envoy electrical reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Driver Door Master Switch Short Circuit
The driver-side master power window and door lock switch fails intermittently, shorts out under moisture ingress, causes burning odor and smoke, prevents window and door lock operation. Some switches have melted connectors and burned wiring harnesses. Water intrusion is a known trigger, particularly in wet conditions. A safety hazard because children can open doors when locks fail and windows cannot be operated in emergencies.
When: Typically 80,000–180,000 miles; can occur as early as under 30,000 miles. Some failures reported after recall repair performed.
Symptoms owners cite: Master switch clicks rapidly, then stops working intermittently or completely; Burning electrical odor and smoke from driver-side door panel; Windows fail to roll down, door locks inoperative; Side mirrors move on their own or become inoperable; Switch housing and connectors melt; Loss of all driver-side door electrical functions
Codes mentioned: NHTSA Campaign 12V406000 (Electrical System, Visibility), NHTSA Campaign 12180 (Driver Door Switch Short Circuit), NHTSA Campaign 13V248000 (Electrical System, Visibility)
Repairs/costs cited: Owners report $500–$2,000 out-of-pocket costs before/after recalls; dealers have withheld repair due to outdated or unavailable parts; some dealers demanded diagnostic fees ($90–$350) despite recall notices; replacement part is standard availability but dealer parts systems sometimes failed to list it.
Recalls/TSBs owners mention: GM recall campaigns 12V406000, 12180, and 13V248000 issued; however, owners report dealers refusing repairs citing closed recalls, vehicle mileage, parts unavailability, or recall already performed; reimbursement denied if repair done outside dealer or before recall issued; one owner reports recall was performed but switch failed 24 days later.
Blower Motor Resistor Failure and Fire
Blower motor speed resistor for heating/AC system burns out, melts wiring connectors, and has caused interior vehicle fires. Resistor fails on low-speed setting most frequently. Fire can start under dashboard behind glove box with minimal warning. Multiple fires reported with rapid smoke buildup. Fuse does not blow before fire ignition.
When: As early as 26,000–28,000 miles; can recur within months of replacement. Affects 2004–2007 models per owner reports.
Symptoms owners cite: Blower motor stops working or operates on limited speed settings only; Faint burning electrical smell, then acrid smoke; Smoke fills cabin within 1 minute, obscuring windshield; Open flame under dashboard behind glove box within 2 minutes; Burned or melted resistor and wiring connectors; Melted wire insulation and charred components
Codes mentioned: Blower Motor Resistor Failure
Repairs/costs cited: Resistor replacement costs $500–$550; dealers often perform repair without investigating root cause; replacement resistor has failed within 2 years on some vehicles; aftermarket repair kits with new wiring connectors available to address connector burn damage.
Recalls/TSBs owners mention: No recall issued despite multiple fire incidents reported. Owner reports mechanic stated 2004–2007 Chevy and GMC vehicles suffer this repeatedly, with 5+ vehicles repaired in one month in Alabama alone.
Ignition Switch Failure Causing Engine Stall at Highway Speed
Ignition switch produces low voltage output, causing engine to stall suddenly during highway driving without warning. Vehicle loses all electrical power, including power steering, power brakes, and airbags. Shift lever becomes locked (electronic-dependent). Vehicle can coast to safety or may stall in traffic, creating serious collision risk. Some owners have replaced the same switch multiple times within 3 years.
When: 65,000–126,000 miles; some failures reported at 65–70 mph highway speeds; recurrent failures within 14 months of prior replacement.
Symptoms owners cite: Engine stalls abruptly while driving, no warning; Loss of power steering and power brakes; All electrical systems and gauges lose power briefly or fully; Engine will not crank after stall, only clicks; Shifter locked in gear due to loss of electronic control; Headlights and dashboard gauges go dark
Codes mentioned: Low Voltage Output from Ignition Switch
Repairs/costs cited: Ignition switch replacement costs $220–$307 for diagnostics, parts, and labor; owners report replacing the same switch 2–3 times within 3 years at total costs of $817 or more; part is not on dealer computer in some cases.
Recalls/TSBs owners mention: GM issued recall for ignition switches on several models but Envoy is not included despite owners reporting identical failure modes and hazard profiles; owners allege GM is aware but has not included Envoy in recall.
StabiliTrak/ABS Spontaneous Engagement and Speed Loss
StabiliTrak and/or ABS system engages without cause on dry, straight highway pavement, causing sudden deceleration as motor retards and brakes activate. Vehicle slows from 65–70 mph to 30–40 mph unexpectedly, creating rear-end collision hazard from following traffic. Intermittent failures occur repeatedly over time with increasing frequency. Firmware upgrades have not resolved issue.
When: Early ownership and ongoing; reported from under 10,000 miles through 55,000 miles; recurring throughout ownership.
Symptoms owners cite: StabiliTrak warning light illuminates intermittently; Sudden, unintended deceleration without brake input; ABS and 4x4 warning lights illuminate together; Beeping alert sounds coinciding with lights; Vehicle slows from highway speed to 30–40 mph; Electrical system voltage fluctuation (altimeter bounces)
Codes mentioned: StabiliTrak System Fault, ABS System Fault, 4x4 Light Illumination, Emergency Brake Light Illumination
Repairs/costs cited: Dealer performed StabiliTrak TSB firmware upgrade at owner cost without correcting issue; dealer unable to find fault on retesting; no parts typically replaced; one owner declined inline fuse installation after being charged for prior unsuccessful repairs.
Recalls/TSBs owners mention: TSB firmware upgrade available but ineffective per owner reports; no recall issued.
Fuel Tank Sender Unit Corrosion and Gasoline Spray
Fuel pump lines and gas sending unit corrode prematurely and spray gasoline onto vehicle underside during driving. Corrosion accelerated by road salt and environmental moisture in cold climates. Vehicle may stall or continue running while leaking fuel. Fire hazard because gasoline-soaked underside can ignite from heat source or spark.
When: Mileage varies; owners in snow states report as baseline issue.
Symptoms owners cite: Strong gasoline odor under vehicle; Gasoline spraying on underside during operation; Vehicle may stall or run erratically; No check engine light despite fuel leak; Wet gasoline pooling under vehicle; Corroded fuel lines visible during inspection
Codes mentioned: Fuel Tank Corrosion
Repairs/costs cited: Dealer diagnoses sender unit and other associated fuel system components as failed; repair costs not specified but owner indicates multiple parts failed on same vehicle.
Recalls/TSBs owners mention: No recall issued despite known issue with salt-climate vehicles; owner states GM is aware of premature corrosion due to poor materials.
Headlight Failure and Low-Beam Malfunction
Low-beam headlights fail to operate, requiring driver to use high beams as workaround. Failure is intermittent and recurring. Parts for repair are unavailable for extended periods (months to years) despite recall being issued.
When: Mileage not consistently specified; one owner at 153,000 miles.
Symptoms owners cite: Low beams fail to illuminate; High beams work when low beams fail; Intermittent failure and recovery
Codes mentioned: NHTSA Campaign 14V755000 (Exterior Lighting), NHTSA Campaign 14V404000 (Visibility)
Repairs/costs cited: Repair parts not available within reasonable timeframe; dealers unable to provide estimated availability date.
Recalls/TSBs owners mention: NHTSA Campaigns 14V755000 and 14V404000 issued; however, remedy parts unavailable for extended periods, delaying or preventing repair.
Fuel Tank Level Sensor Failure and Check Engine Light
Fuel tank level sensor fails repeatedly, causing incorrect fuel gauge reading and check engine light activation. Same sensor failure recurs multiple times on same vehicle within a few years.
When: Approximately 28,000–83,000 miles; failures recurred at 65,000 and 83,000 miles on same vehicle.
Symptoms owners cite: Gas gauge reads empty despite fuel in tank; Check engine light illuminates; Engine light comes on upon filling tank and lasts 25–100 miles; Gauge needle drops to empty and remains there
Codes mentioned: Fuel Tank Level Sensor Fault
Repairs/costs cited: Sensor replacement costs not specified; owner performed DIY replacement on second failure to avoid dealer cost; currently unrepaired due to cost.
Recalls/TSBs owners mention: GM replaced sensor under warranty for first failure; subsequent failures not covered.
Electrical System Voltage Instability and Alternator Failure
Vehicle experiences sudden stalling caused by voltage instability or alternator failure. Vehicle stalls while driving and requires jump-start or battery charge to restart. Problem recurs after short driving intervals. Dealer has misdiagnosed as alternator when root cause may be electrical system fault.
When: 85,000–126,000 miles.
Symptoms owners cite: Vehicle stalls without warning during driving; Requires jump-start to restart; Failure recurs within short timeframe after restart; Low voltage output from alternator or electrical system
Codes mentioned: Alternator Failure, Battery Voltage Fault
Repairs/costs cited: Alternator replacement recommended by dealer; owner unable to complete repair; costs not specified.
Recalls/TSBs owners mention: No manufacturer response documented.
Sudden Acceleration on Left Turn
Vehicle accelerates to full throttle without driver input while executing a left turn onto highway, causing loss of directional control and collision with concrete barrier. Isolated incident report but aligns with broader electrical system concerns.
When: Approximately 40,000 miles.
Symptoms owners cite: Unexpected full-throttle acceleration without pedal input; Vehicle speed increased uncontrollably on wet pavement; Loss of steering control; Acceleration stopped upon impact
Repairs/costs cited: Not repaired; owner drove approximately 1 mile after incident without further occurrence.
Recalls/TSBs owners mention: Owner sought information on whether others had reported condition and requested protocol to prevent recurrence; no manufacturer response documented.
Intermittent Headlight and Electrical Load Issues
Headlights shut off randomly during night driving at highway speed, creating immediate safety hazard. Rear lights may also shut off. Lights can be restored by stopping vehicle and restarting engine. Air bag light remains on continuously despite no recall for intermittent airbag deployment. Electrical dimming occurs when pressing power window buttons, indicating voltage instability.
When: Multiple incidents within same driving period.
Symptoms owners cite: Headlights go dark while driving at 70 mph on dark road; Rear lights may go dark simultaneously; Lights restore after engine restart; Dashboard gauges flicker or disappear briefly; Lights dim when power windows activated; Intermittent gas cap warning light; Air bag warning light stays on permanently
Codes mentioned: Intermittent Headlight Fault, Airbag System Fault
Repairs/costs cited: Not repaired; owner has accommodated safety risk by avoiding night driving.
Recalls/TSBs owners mention: No manufacturer response documented; air bag light not addressed by any recall despite being listed as safety issue.
Windshield Wiper and Audio System Unintended Operation
Windshield wipers and washer spray activate independently when vehicle is running, particularly when turn signal lever is moved. Wipers continue spraying fluid even after ignition is off and remain active until draining entire washer reservoir. Audio system produces distorted sound. Turning vehicle off and on does not stop wiper cycle; condition persists until washer fluid depletes.
When: Mileage not specified.
Symptoms owners cite: Wipers and washer spray activate when turn signal moved; Wipers remain on in neutral switch position; Wipers and spray continue after engine off; Washer reservoir drained completely without driver input; Speakers produce distorted sound
Repairs/costs cited: Not repaired.
Recalls/TSBs owners mention: No manufacturer response documented.
Instrument Panel and Electrical Control Failures After Blower Resistor Repair
After blower resistor replacement, fuel gauge becomes inoperable despite technician replacing wiring harness. Indicates that resistor fire damage extends beyond obvious components and repair may not address full extent of electrical damage.
When: 26,000–27,000 miles.
Symptoms owners cite: Fuel gauge inoperable on instrument panel after repair; Heating resistor melted wires in ignition system
Repairs/costs cited: Wiring harness replacement completed; dealer advised not to use AC on low power setting, only medium/high.
Recalls/TSBs owners mention: No recall; workaround advice offered (avoid low-speed AC operation).
Door Lock and Mirror Controls Inoperative After Ignition Off
After turning off vehicle and removing ignition key, passenger-side rearview mirror moves up and down independently, driver seat slides back without input, and all instrument panel lights remain illuminated. Indicates electrical system does not properly de-energize when ignition is off.
When: 104,000 miles.
Symptoms owners cite: Rearview mirror operates after key removed; Driver seat moves independently after engine off; Instrument panel lights remain on without key; Manual dimmer switch required to turn off panel lights
Repairs/costs cited: Not repaired.
Recalls/TSBs owners mention: Dealer informed owner VIN not included in any recall; manufacturer referred owner to NHTSA.
Programmable Control Module (PCM) Failure Causing Engine Shutdown
Programmable control module fails, causing engine to shut down completely while driving without warning. StabiliTrak and Check Engine lights illuminate before shutdown. Defective PCM is readily available refurbished part, suggesting design or manufacturing defect rather than wear issue. Multiple occurrences during same trip.
When: Certified used purchase at 07/08 with failure shortly after.
Symptoms owners cite: StabiliTrak, Check Engine, and Reduced Engine Power lights illuminate; Engine cuts off while driving; Vehicle restarts after brief wait; All warning lights clear after restart; Failure recurs multiple times on same trip
Codes mentioned: PCM Defective, Check Engine Light, StabiliTrak Light, Reduced Engine Power Light
Repairs/costs cited: PCM refurbished with one-year warranty; part is readily available, not special order.
Recalls/TSBs owners mention: No manufacturer coverage; codes not covered by GMC per owner report.
Synthesized from 114 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
2006 GMC envoy 360 driving at night, the headlights cuts off. The power door locks, power windows switches and headlights function intermittently or may stop working, the air suspension won't raise to its normal level. *mw the vehicle had to be jump started, because it would not start. The consumer attached recall letter 14v404000. However, the parts were not available. *jb
GMC's campaign number is 12180 for this issue but when I called they said I would have to pay for the diagnosis and repair myself. Drivers side power window and door lock switch started rapidly clicking and smoking causing door lock control not to work and windows unable to roll down trapping passengers in vehicle. Switch started working again the next day but is now not working or partially…
Tl* the contact owns a 2006 GMC envoy. The contact stated that the vehicle stalled while driving approximately 30 MPH. The contact merged to the shoulder, powered off and restarted the vehicle. The vehicle was taken to the dealer for diagnostic testing. The technician stated that the alternator and the battery needed to be replaced. The vehicle was taken to the dealer on multiple occasions for…
I parked my car and went into a store and when I came out I could smell a burning smell. My car would not unlock from the drivers door and when I got into my car I seen that my electrical panel on the drivers side blew up. *tr
Tl* the contact owns a 2006 GMC envoy. The contact stated that shortly after having the vehicle serviced under NHTSA campaign number: 13v248000 (electrical system, visibility), a fire erupted from the driver's side door panel area. The fire department was called to extinguish the fire and a report was filed. The vehicle was not inspected or repaired. The manufacturer was notified of the failure.…
Had electrical trouble with your 2006 GMC Envoy?
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 electrical problem on the 2006 GMC Envoy?
It's a meaningful issue. 114 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 96 complaints that reported odometer mileage, most electrical failures cluster between 65,000 and 126,000 miles, with the median around 100,000. A quarter of owners report trouble before 65,000; a quarter make it past 126,000. 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 $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/2006/GMC/Envoy.
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.