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 Chevrolet Impala electrical problems
severe 101 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
101
Recalls
0
Avg fix
$850
3crashes
12fires
4injuries
When does it fail?
Of the 101 electrical complaints filed for the 2006 Chevrolet Impala, 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 101 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
2006 Chevrolet Impala owners describe a constellation of electrical problems that span from nuisance to life-threatening. The most recurring issue is sudden engine power loss—vehicle drops to crawling speed without warning, displaying "Engine Power Reduced" or "Service Throttle" messages. Multiple owners have replaced throttle bodies and throttle actuator modules only to have identical codes and symptoms return within months or weeks. Several owners report stalling at highway speeds (55–65 mph), leaving them stranded or nearly hit by trailing traffic.
Electrical fires represent the most dangerous failure mode. At least six narratives describe fires originating in fuse boxes and wiring harnesses, with vehicles catching fire while driving or parked. One owner's vehicle became a total loss two weeks after paying it off. The rear defrost connector issue is widespread—an undersized bulkhead connector behind the passenger kick panel burns out under normal operation, creating a fire hazard.
TPMS and keyless entry systems fail simultaneously due to a defective module (Service Bulletin 1990156 exists), leaving owners with zero tire pressure readings and keyless fobs that work only 2 feet from the vehicle. Ignition switches that fail to hold the key in ON position have caused engine shutdowns at highway speeds, loss of power steering and braking, and crashes. The factory recall replaces keys rather than the faulty ignition itself. Battery drain issues plague owners who report jump-starting vehicles repeatedly despite new batteries. Water intrusion through the fuse box corrodes electrical components. Air bags fail to deploy during collisions. Taken together, these failures created a pattern of electrical instability that left owners frustrated, unsafe, and out-of-pocket for repairs GM declined to cover under warranty or recall.
Same Chevrolet Impala electrical reports on nearby years: 2005 · 2007 · 2008 · 2009
Failure modes owners describe
Reduced Engine Power / Throttle Actuator Control Module (TACM) Failure
Vehicle enters limp mode, dropping speed to under 40 mph without warning. Engine shakes, sputters, and loses acceleration. Dashboard displays 'Engine Power Reduced' or 'Service Throttle' messages. Owners report replacing throttle bodies, throttle position sensors, and TACM modules without permanent resolution.
When: Intermittent, occurring at various mileages between 140k and 193k; can happen at highway speeds (55-65 mph) or residential speeds (25-35 mph)
Symptoms owners cite: Sudden power loss and deceleration without warning; Engine shaking and sputtering; Unable to accelerate; Limp mode restricts speed to <40 mph; Codes: P2176, P2135, P0121, P2119, P1516; Vehicle may stall on highway
Codes mentioned: P2176, P2135, P0121, P2119, P1516
Repairs/costs cited: Throttle body replacement ($300+), throttle position sensor replacement, battery cable inspection, TACM replacement; multiple repeat repairs required on same vehicle
Electrical Fire — Fuse Box and Wiring Harness
Vehicle catches fire or produces smoke originating from fuse box area, wiring harness, or under dashboard. Fires have occurred while driving and while parked. Wiring harness melting and fuse box corrosion reported. Multiple owners report discovering burned connectors and melted insulation behind passenger kick panel.
When: At various mileages; one report at 22k miles; fires while driving at highway speeds and while parked
Symptoms owners cite: Burning smell from vents or under dashboard; Smoke coming from vehicle interior; Flames visible from under hood or glove box area; Complete vehicle destruction in multiple cases; Door locks fail due to electrical loss
Repairs/costs cited: Wiring harness replacement, fuse box panel replacement/sealing; dealers have advised fires were a fire hazard and surprised vehicle did not ignite
Recalls/TSBs owners mention: GM claimed no responsibility in multiple cases despite professional repairs and fire dept confirmation of electrical origin
Rear Defrost Connector Burnout
Rear defroster stops working due to undersized bulkhead connector on passenger side kick plate that burns out under normal operation. Connector cannot handle the amperage required for high-current defroster wires. Fire hazard reported as the connector burns.
When: Various mileages; widespread issue affecting 2006-2013 Impala model years
Symptoms owners cite: Rear defroster inoperative; Burned connector behind passenger kick panel; Melted wire insulation (purple wire); Burned connector pins on both sides; Potential fire hazard
Repairs/costs cited: Connector and wiring harness replacement; YouTube DIY repairs exist but risky for inexperienced mechanics
Recalls/TSBs owners mention: No recall issued despite widespread complaints and known YouTube fix documentation
Tire Pressure Monitoring System (TPMS) / Keyless Entry Module Failure
Defective module controls both TPMS and remote keyless entry systems using same antenna. Module fails, causing TPMS to lose tire pressure readings and keyless entry fob range to drop to ~2 feet. Service bulletin exists (Document ID 1990156) but GM refuses warranty coverage.
When: Multiple occurrences per day while driving; affects multiple vehicles in cluster
Symptoms owners cite: Repeated 'Service Tire Monitoring System' alerts while driving; Loss of tire pressure readings multiple times daily; Keyless entry fob inoperative except at extremely close range (~2 feet); Dangerous: owner missed flat tire that could have caused highway blowout
Repairs/costs cited: Module replacement required; TPMS sensor replacement attempted but ineffective; instrument cluster replacement attempted but ineffective
Recalls/TSBs owners mention: Service bulletin 1990156 available but GM denied warranty coverage; refused replacement without consumer charge
Ignition Switch / Key Retention Failure
Ignition switch fails to hold key in ON position; key turns away from ON position causing loss of engine power, steering, and braking while driving. Factory recall involves replacing keys to be lighter-weight and fob-incompatible, not replacing the worn ignition switch itself. Consumer reports note worn internal connections from years of use with heavier key.
When: After 8+ years of normal use; affects multiple vehicles
Symptoms owners cite: Key drifts away from ON position while driving; Engine shuts off while driving at highway speeds; Loss of power steering and braking; Total loss of electrical power; Vehicle stalls unexpectedly
Repairs/costs cited: GM recall: key replacement only (lightweight key, no fob attachment allowed); does not replace faulty ignition switch mechanism
Recalls/TSBs owners mention: NHTSA Campaign 14V355000 (Electrical System) - key replacement recall; consumers report fix is inadequate as it doesn't address worn ignition internals
Engine Stalling During Motion — Electrical System
Engine stalls without warning while vehicle is in motion at various speeds (4 mph to 65 mph). Occurs after electrical system servicing in some cases. Dashboard gauges fail to read. Transmission locks or fails to shift. Multiple restart attempts required. Serious safety risk as stalling causes loss of power steering and braking.
When: At various mileages; some occur immediately after electrical system service recall 14V355000
Symptoms owners cite: Engine stalls while driving; Instrument panel gauges fail to read; Transmission fails to shift into gears; Vehicle becomes immobilized on roadway; Power steering and braking lost; Multiple restart attempts needed before vehicle runs
Repairs/costs cited: Fuse box panel replacement, connector tightening, computer software update; stalling may persist despite repairs
Recalls/TSBs owners mention: NHTSA Campaign 14V355000 (Electrical System); software updates applied but failures continue
Battery Drain / Parasitic Drain
Battery dies prematurely and repeatedly, even after replacement. Vehicle requires frequent jump-starts. At 8,700 miles, one owner reports battery dropping below 8 volts locks transmission. Ticking noise from blower box reported as causing battery drain. Some owners report replacing battery multiple times within 1-2 years.
When: As early as 8,700 miles; recurring throughout ownership; one instance after vehicle sits unused for 1-2 weeks
Symptoms owners cite: Battery dies repeatedly despite replacement; Requires jump-start; takes 10-20 minutes to jump; Vehicle won't start after prolonged inactivity; Ticking noise from blower/fan box while vehicle off and keys removed; Low voltage (below 8V) locks transmission; Check engine light follows battery issue
Codes mentioned: P2135
Repairs/costs cited: Battery replacement (repeated); mechanic unable to pinpoint parasitic drain source; dealership could not identify power drainage location
Recalls/TSBs owners mention: No assistance offered; manufacturer stated vehicle acceptable if kept in regular use without prolonged inactivity
Electrical Audio Interference — Ear-Piercing Squeal in Speakers
High-pitched, ear-piercing noise from driver-side speaker lasts ~23 minutes after startup. Turning on directional signal stops the noise. Dealer replaced amplifier; noise returned next day. Issue persists despite multiple visits and parts replacements.
When: From day of purchase; recurs daily
Symptoms owners cite: High-pitched, ear-piercing squeal from driver speaker; Noise lasts approximately 23 minutes after vehicle start; Turning on directional signal stops the noise; Noise recorded on tape for dealer review
Repairs/costs cited: Amplifier replacement attempted; seatbelt kit replaced; radio software updated; issue recurred next day after amplifier replacement
Recalls/TSBs owners mention: Dealer visited 5+ times; GM refused vehicle replacement despite multiple failed repair attempts; refused to provide support
Dash/Instrument Cluster Electrical Failure
Instrument gauges stop functioning, lose all readings, or become erratic. Speedometer, temperature gauge, and oil pressure readings fail. Vehicle shifts into limp mode or becomes undrivable when gauges fail. Coolant temperature gauge failure masks engine overheating, leading to catastrophic engine failure (thrown rod).
When: During normal driving; temperature gauge failure preceded rod failure
Symptoms owners cite: Gauge cluster stops reading all instruments; Speedometer inoperative or inaccurate; Temperature gauge fails to indicate engine overheating; Speed reading faster than speedometer indicates; Transmission won't shift or shift indicators wrong; ABS warning light illuminates; ABS module failure follows
Repairs/costs cited: Instrument cluster replacement; ABS module replacement at 75k miles
Headlight / Signal / Lighting Control Failure
Front electrical system malfunctions. Turn signals inoperative; bright lights come on unintentionally with turn signal. Interior lights fail to illuminate when doors open but illuminate when doors close. Multiple electrical gremlins occur simultaneously suggesting broader electrical harness or BCM issue.
When: ~1 month after purchase; long-standing on same vehicle
Symptoms owners cite: Cannot use turn signals; Bright lights activate when turn signal activated; Interior lights don't work when door opens but work when door closes; Entire front electrical area 'went haywire'; Battery drains despite jumps (10-20 minutes to jump)
Repairs/costs cited: Dealership unable to properly repair; mechanic unable to fix
Rear Door Lock Mechanism Failure
Back doors lock and become inoperable from inside for 3-4 months, trapping occupants. Both rear doors affected simultaneously. Safety issue: in accident scenario, rear passengers cannot exit. Doors eventually begin working again as weather changes.
When: June of year of ownership; lasted 3-4 months before one door, then other began working in winter
Symptoms owners cite: Rear doors locked, cannot be opened from inside; Door lock indicators show doors not locked but won't open internally; Can only open doors from outside; Both rear doors fail together; Malfunction lasts 3-4 months
Repairs/costs cited: No repair documented; issue resolved on its own with seasonal temperature change
Ignition Key Ejection Failure
Key fails to eject from ignition when turned to OFF position, remaining stuck in lock cylinder. Battery dies as result. Failure recurs multiple times. Internet workaround solutions required.
When: At ~90k miles; occurred three times
Symptoms owners cite: Key stuck in ignition when turned to OFF; Cannot remove key from lock cylinder; Battery drains while key stuck in ignition; Repeated failures despite attempts to fix
Repairs/costs cited: Internet DIY removal instructions provided consumer workaround; no professional repair documented
Recalls/TSBs owners mention: Manufacturer made aware but no resolution documented
FOB Keyless Entry System Failure
Remote keyless entry fob fails shortly after purchase or repair. Fobs stop functioning within 2 days of dealer 'repair.' Dealer reports this is a common issue at their service department. Multiple owners report same problem.
When: 2 days after dealer repair; early in vehicle ownership
Symptoms owners cite: FOB fails to unlock vehicle doors; Door lock controls inoperable; FOB stops working almost immediately after being serviced
Repairs/costs cited: Dealer service attempts; repeated failures within 2 days of repair
Engine Coolant System Overheating / Gauge Failure
Temperature gauge fails to indicate engine overheating. Engine overheats without warning, leading to catastrophic failure (thrown rod). Motor mounts unstable. Speedometer reading inaccurate compared to actual vehicle speed.
When: Within 8 months of purchase; high-mileage vehicle
Symptoms owners cite: Temperature gauge shows normal when engine running hot; No dashboard warning of overheating; Engine catastrophically fails (thrown rod); Motor mounts unstable and cause shifting; Speedometer appears to read slower than actual speed
Repairs/costs cited: Engine replacement/rebuild required after rod failure; motor mount service
A/C Blend Door Actuator Premature Failure
AC blend door actuators fail prematurely after only ~15 months of normal use despite difficult-to-reach location suggesting design should be robust. Vehicle has three actuators; owner replaced all three at least twice, with most difficult unit replaced four times over 10 years.
When: Approximately 15-month intervals throughout ownership
Symptoms owners cite: Climate control stops functioning properly; AC blend door actuators fail repeatedly
Repairs/costs cited: Actuator replacement cost: $27 per part, but $100s in labor due to poor accessibility; three actuators in vehicle means cumulative cost significant
Transmission Shift / No-Crank-No-Start Condition
Vehicle stops running while driving (no-crank-no-start condition). Engine loses power at highway speeds. Vehicle cannot restart. 'Power Engine Reduced' message precedes complete failure. Stops when shifting from stop or pulling out, transmission refuses to shift into gear.
When: At ~45 mph highway speed; at stop signs and pulling out from stops
Symptoms owners cite: Engine stalls while driving at highway speed; 'Power Engine Reduced' message appears before stall; Vehicle unable to restart (no-crank-no-start); Transmission will not shift into gear; No diagnostic codes found by independent mechanic; Transmission fluid normal color and level
Codes mentioned: P0230, P0010
Repairs/costs cited: No diagnosis or repair completed; vehicle not serviced due to no-start condition
Body Control Module (BCM) / DIC Electrical Malfunction
Driver Information Center (DIC) and radio remain on for 15 minutes after closing doors, draining battery. BCM suspected. Multiple simultaneous electrical issues (check engine, oil loss, steering squeal) suggest BCM fault.
When: Shortly after purchase
Symptoms owners cite: DIC display stays lit 15 minutes after door closure; Radio stays on 15 minutes after door closure; Check engine light; Steering wheel squealing; Simultaneous oil consumption (no external leaks)
Repairs/costs cited: Suspected BCM malfunction; no repair confirmed
Intermittent Engine Running / Unintended Operation
Engine continues running after ignition turned to OFF position. Engine will not shut off immediately when key turned off.
When: Specific date not provided; early ownership
Symptoms owners cite: Engine keeps running after turning ignition to OFF; Key turned OFF but engine continues operating
Excessive Engine Heat Retention
Engine remains hot for approximately 3 hours after shutting off vehicle. Suspected wiring defect causing cooling fan to not shut off or malfunction.
When: At 52k miles
Symptoms owners cite: Engine remains warm for ~3 hours after shutdown; Excessive heat retention; Suspected cooling fan malfunction
Repairs/costs cited: Not diagnosed or repaired
Recalls/TSBs owners mention: Not contacted
A/C System Intermittent Operation
Air conditioning works intermittently, blowing cold air then switching to hot air without driver input. Problem occurs on and off unpredictably.
When: From early in vehicle ownership
Symptoms owners cite: AC blows cold then hot randomly; No cruise control engagement (car speeds up randomly); Car stalls at stop signs; must step on gas to keep running; Engine shakes and misses under acceleration
Repairs/costs cited: Dealer unable to find problems
Recalls/TSBs owners mention: Chevy refused to assist; stated unable to find problems
Air Bag Failure to Deploy
Air bags fail to deploy during collision. Vehicle involved in crash at 20-35 mph; air bags do not deploy. Air bag warning indicator illuminates. Safety system completely ineffective.
When: During crashes at 20-35 mph impact speeds
Symptoms owners cite: Air bags fail to deploy upon collision; Air bag warning light illuminates; No protective systems function during crash
Repairs/costs cited: Vehicle not repaired after crashes
Water Intrusion Through Fuse Box Panel
Heavy rain causes water to leak into vehicle interior on passenger side through fuse box panel. Creates puddle on passenger floor. Wets electrical system, disabling window motors. Dealer unable to duplicate failure but general manager confirmed water entry through fuse box. Multiple repair attempts failed; issue recurred.
When: Since April 2006; vehicle had water intrusion issue from near-purchase
Symptoms owners cite: Water puddle on passenger floor during rain; Electrical system affected by water; Window motors fail due to water intrusion; Water visible entering through fuse box panel
Repairs/costs cited: Fuse box panel repair, cowl sealing; repairs failed and issue recurred
Clicking Noise from Air Conditioner
Abnormal clicking noise emanates from AC system. Dealer inspected but could not determine cause or repair.
When: At 59k miles
Symptoms owners cite: Abnormal clicking noise from air conditioner; Cause unable to be determined
Repairs/costs cited: Not repaired
Recalls/TSBs owners mention: Manufacturer advised contacting dealer; dealer unable to determine cause
Synthesized from 101 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
I've had an ongoing issue since this spring with an issue on traction control and the display reporting 'reduced engine power ". I've now had the throttle body sensor and power train computer module replaced. I'll be driving at a rate of speed on the highway of apx 60mph and then these error messages appear and the cruise kicks off. There's hesitation as I try to accelerate. *js
I got a P2138 code for Accelerator Pedal Sensor error. From what I have seen this is caused by the two sensors not matching. I have repaired this issue previously about 3 years ago, but it has happened again. This seems to be a common issue with GM cars of this era.
I purchased a 2006 Chevrolet impala ltz in december of 2005 and approximately 3 months ago I started to receive a message from the driver information center that the tire pressure monitor system needed to be serviced. I have taken the vehicle to our local Chevrolet dealer on at least five occasions for this problem and it is still not fixed. The dealership has more than fulfilled it's part of the…
Tire pressure monitor system failed key fobs became inoperative including remote start, issues are related gm has placed tsb. *nm
Had electrical trouble with your 2006 Chevrolet Impala?
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 Impala?
It's a meaningful issue. 101 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 54 complaints that reported odometer mileage, most electrical failures cluster between 50,000 and 101,000 miles, with the median around 85,000. A quarter of owners report trouble before 50,000; a quarter make it past 101,000. 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/Impala.
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.