This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
full bulletin at NHTSA ↗2006 Chevrolet Uplander electrical problems
moderate 30 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
30
Recalls
0
Avg fix
$850
When does it fail?
Of the 30 electrical complaints filed for the 2006 Chevrolet Uplander, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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 30 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.
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 ↗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 ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2006 Chevrolet Uplander has racked up 30 electrical complaints covering a pattern of system-wide failures. The most common issue is flickering or dimming headlights and dashboard lights, often worse under acceleration or at highway speeds. Owners report the lights fluctuating between full brightness and near-darkness, leading other drivers to honk or flash high beams at them—a genuine safety distraction. Many took the vehicle to dealers who either couldn't duplicate the problem or blamed it on the "advanced variable charge voltage regulator" as normal operation, which owners dispute.
Battery and charging system failures rank second. Several owners reported batteries draining prematurely or dying shortly after replacement, even with the OEM-recommended battery. One owner's alternator was replaced twice along with the voltage regulator without fixing the voltage swing (15V down to 11.9V and back).
Power sliding door malfunctions are widespread. Doors won't open, won't close, close partially, or open/close on their own without warning. Roller bearings failed on at least one driver's side door. Faulty sensors trigger false door-open alarms even when doors are shut, requiring owners to pull over and manually reset. Some dealers disabled the automatic feature entirely rather than fix it.
Dashboard instrument clusters fail intermittently—fuel gauges read empty when full, ABS and traction control lights stay on, engine check lights appear without cause, and entire gauge clusters go dead, leaving drivers without speed or fuel information. One owner described the dashboard becoming completely inoperable for minutes at a time, with all warning lights flashing before power returned.
Additional problems include corroded wiring harnesses under the driver-side seat exposed to the elements, rear heater fan running on its own, body control module failures, and electrical shocks when exiting the vehicle.
Same Chevrolet Uplander electrical reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Headlight and Dashboard Light Flickering/Dimming
Lights flicker, dim, or completely shut off during normal driving, especially at highway speeds or under acceleration. Voltage regulation appears unstable, fluctuating between approximately 15V and 11.9V. Affects driver visibility and creates confusion among other motorists who interpret the flickering as flashing signals.
When: Occurs from early ownership onward; one owner noted it happened on drive home from dealer with only 21 miles
Symptoms owners cite: Headlights and interior lights flicker or dim intermittently; Lights brighten and darken rapidly; Lights flutter during acceleration or uphill driving; Entire dashboard lights go out temporarily; Fan speeds vary in sync with light fluctuations
Repairs/costs cited: Dealer replaced alternator (at least one owner replaced twice), voltage regulator, and battery cables with capacitor shielding per bulletin; problems persisted
Recalls/TSBs owners mention: One dealer stated variable charge voltage regulator as normal operation
Battery Drain and Charging System Failure
Battery dies prematurely or within days of replacement, even when using OEM-recommended battery. Computer wiring issues documented as draining battery. Vehicle electrical system fails to support full load.
When: Some reported within days of purchase; one occurred at 45,000 miles
Symptoms owners cite: Battery dies despite recent replacement; Vehicle shuts down completely while driving or parked; Entire vehicle loses power in parking garage; Doors lock and windows fail when power is lost
Repairs/costs cited: One owner had vehicle towed; repair shop cited battery not supporting electrical system despite being manual-recommended type
Power Sliding Door Malfunction
Automatic sliding doors fail to open, fail to close, open/close on their own without user input, or close incompletely. Faulty sensors trigger false door-open alerts. Doors unsafe to close when automatic mechanism is engaged.
When: One failure at 12,000 miles; others ongoing throughout ownership
Symptoms owners cite: Door will not open or stays open; Door closes incompletely; Door opens or closes on its own while driving; Door alarm chimes despite door being closed; Automatic mechanism prevents manual door closure; Roller bearings failed allowing door to drop
Repairs/costs cited: Multiple parts replaced on doors at dealership; owners had doors serviced 10+ times over ownership; at least one roller bearing replaced twice; one door nearly came off completely
Recalls/TSBs owners mention: Dealers eventually disabled automatic feature rather than repair; GM dealer stated they could not assist further
Dashboard Instrument Cluster Failure
Gauges and warning lights malfunction intermittently or completely. Fuel gauge reads empty when tank is full or reads incorrectly depending on vehicle slope. Speed and fuel information unavailable, creating safety hazard. Entire cluster goes dark for minutes.
When: One reported at 80 miles; another at 129,000 miles; occurs throughout ownership
Symptoms owners cite: Fuel gauge reads empty or near-empty when tank is full; Fuel gauge reading corrects after adding small amount of fuel or driving 10-20 miles; Speedometer not available at night; All dashboard gauges go dark and unresponsive (RPM, fuel, temperature, oil pressure, mileage); Gauge cluster becomes inoperable for several minutes then returns; No codes available due to darkness
Repairs/costs cited: One vehicle had ECM reprogrammed; another was not repaired
Recalls/TSBs owners mention: Manufacturer aware of fuel gauge issues according to one owner report
Intermittent Engine and Warning Light Issues
Check engine light, ABS light, traction control light, service brake light, and theft alarm light activate without corresponding actual faults or cease to turn off despite repairs.
When: Throughout ownership; one owner reported ongoing since purchase in November 2007
Symptoms owners cite: Check engine light stays on continuously; Check gas cap light comes on despite cap replacement; ABS light stays on despite hub replacement; Service brake system light activates; Traction control kicks in unexpectedly during highway driving; Check theft system alarm dings with all trouble lights flashing; All trouble lights flash on and off simultaneously; Brakes lock up during normal driving
Repairs/costs cited: Brake pads, rotors, calipers replaced; gas cap replaced; ABS hub replaced; vehicle reprogrammed twice; parts replaced but issues recurred
Corroded and Exposed Wiring Harness
Electrical wiring lines under driver-side passenger seat remain exposed to all weather elements without protection. Wires corroded and non-functional, creating fire and explosion hazard due to proximity to fuel tank and fuel rails.
When: Discovered during owner diagnosis but may have existed from manufacture
Symptoms owners cite: Burning smell detected prior to discovery; False diagnostic codes appearing when testing; Wires corroded and disconnected
Repairs/costs cited: Owner manually unplugged and removed corroded wires; described wires as simply plugged through vehicle with no protection
Air Conditioning Actuator/Reset Issues
Air conditioning blows steam and stops working, requiring computer reset or vehicle restart to restore function. Problem repeats multiple times during single trip.
When: One reported at 750 miles on vehicle
Symptoms owners cite: AC blows steam instead of cool air; AC stops working completely; AC function returns after computer reset or vehicle restart; Problem recurs multiple times same trip
Repairs/costs cited: O-ring on compressor replaced and system recharged by dealership; another dealership suspected actuator and reset computer
Recalls/TSBs owners mention: Manufacturer (Tomball Parkway Chevy contacted) acknowledged awareness of similar complaints from across the US but stated they were not yet sure how to fix
Rear Heater Blower Fan Running Uncontrolled
Rear heater blower runs at high speed continuously despite being switched off at dash control. Problem lasts exactly one day then resolves, repeating weeks or months later in identical pattern.
When: One reported occurrence; pattern described as reoccurring intermittently
Symptoms owners cite: Rear heater fan runs at high speed uncontrolled; Fan continues blowing despite dash control switched off; Problem lasts entire day then resolves; Pattern repeats weeks or months later
Repairs/costs cited: Owner manually pulls rear heater blower fuse when problem occurs and replaces fuse following day when problem self-resolves
Parking Brake Alarm and Indicator Malfunction
Parking brake alarm sounds and dash indicator light illuminates while driving even though parking brake is not engaged. Problem exhibits exact one-day duration pattern then disappears, recurring weeks or months later.
When: One reported occurrence; pattern reoccurs periodically
Symptoms owners cite: Parking brake audible alarm sounds while driving; Parking brake indicator light illuminates; Alarm starts sporadically at day beginning then becomes constant during driving; Problem lasts entire day then resolves completely; Pattern repeats weeks or months later
Radio Malfunction and Dropout
Radio won't work intermittently, fails to turn on when vehicle first starts, or radio operation causes rapid battery drain. Radio lighting works inconsistently.
When: Throughout ownership
Symptoms owners cite: Radio will not work; Radio fails to come on when vehicle initially started; Radio lighting works intermittently; CD player reads disc read error; Radio operation allegedly causes battery drain
Repairs/costs cited: Media player replaced; owner advised not to use radio due to battery drain concerns
Synthesized from 30 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
2006 Chevy uplander,problems occurring since we purchased- intermittent starting, starting then stalling, smells like sulfur and there's a clunking in the front. Recent problems- voltage is varying causing lights to dim and brighten. *tr
Exterior and interior lights as well as the blower fan lose power which makes the lights dim and the blower slow down. Dealer installed a capacitor and positive battery cable shielding as per their bulletin, but this did not correct the problem. I don't believe this should be considered a normal characteristic as I have been told by the service manager on several occasions. I am afraid that one…
Had electrical trouble with your 2006 Chevrolet Uplander?
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 Chevrolet Uplander?
It's a documented issue but not catastrophic. 30 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Across the 20 complaints that reported odometer mileage, most electrical failures cluster between 12,000 and 151,000 miles, with the median around 58,000. A quarter of owners report trouble before 12,000; a quarter make it past 151,000. 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/Chevrolet/Uplander.
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.