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 ↗2005 Buick Terraza electrical problems
severe 23 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
23
Recalls
0
Avg fix
$850
1crash
1injury
When does it fail?
Of the 23 electrical complaints filed for the 2005 Buick Terraza, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
Electrical accounts for 19% of all owner complaints filed against this vehicle, across 8 categories tracked.
No new NHTSA electrical complaint has been filed on this vehicle in over 14 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 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 2005 Buick Terraza electrical system is a minefield of intermittent failures affecting safety. The most serious: power sliding doors unlatch and swing open during highway driving—sometimes at 50+ mph—with warning chimes blaring and interior lights flashing. Owners report stopping traffic on busy roads to close doors or canceling trips entirely because kids are scared. A dealership notes this is a known issue (GM TSB #07-08-007), yet NHTSA found no defect requiring recall.
Equally dangerous, the stability control system activates without cause, slams on the brakes mid-highway without driver input, and renders steering unresponsive. One owner dropped from 40 mph to 5 mph in a second and lost all control. The ignition switch is faulty—bumping a speed bump can eject the key while the van is rolling. The horn barely functions (requires both thumbs pressing hard to work, only in one corner). Keyless remotes fail after two years; starters get stuck from day one; the ABS light stays on despite multiple repairs; brake response is unpredictable; and wiring harness damage causes random chimes and electrical gremlins throughout. Owners report dealerships finding the same problems across multiple vehicles but offering no permanent solutions.
Failure modes owners describe
Stability Control / Traction Control Malfunction with Brake Lock
Stability control and traction control systems activate incorrectly during normal driving, causing sudden braking or brake lock-up without driver input, loss of steering control, or dramatic speed reduction. Owners report being scared to drive on highways and having to replace brake components unnecessarily.
When: During normal highway driving; one case at 40 mph
Symptoms owners cite: Stability track system engages in error; Sudden deceleration from highway speed to 5 mph in one second; Steering becomes unresponsive; Traction control and system stability indicators illuminate; Brakes lock up without pedal depression
Repairs/costs cited: Dealership replaced short-wire; harness repaired at least twice with other component replacements
Recalls/TSBs owners mention: No recall issued; GM issued TSBs for related sliding door problems (TSB #07-08-007, #07-08-007 A-D)
Ignition Switch / Key Retention Failure
Keys pop out of ignition or become dislodged during minor bumps or road impacts while the vehicle is in motion, leaving the engine running. One dealer attributed this to a 'bad cut in the key,' but owner noted this would allow a bump key to start the vehicle, suggesting an actual ignition switch defect.
When: Occurs on impact (speed bumps, potholes); one case at 144,499 miles
Symptoms owners cite: Keys eject from ignition during minor road impact or speed bump; Vehicle continues running with key out; Key cannot be reliably reinserted without ejecting again; Abnormal noise on restart attempt after impact
Repairs/costs cited: Dealer blamed 'bad cut in key'; no repair documented
Recalls/TSBs owners mention: Owner states 2005 Buick Terraza should be on GM recall list for ignition switch defects
Power Sliding Door Unlatching and Opening During Driving
Rear power sliding doors latch or unlock themselves and open while the vehicle is in motion, including at highway speeds. Doors open with or without buttons activated and cannot be controlled. Owners cancel trips and avoid transporting children due to safety concerns.
When: Randomly during highway driving; cases cited on I-95 Florida highway, interstate, and during turns at busy intersections
Symptoms owners cite: Rear sliding doors unlatch on their own during driving; Doors open independently at highway speeds; Warning chimes sound repeatedly; Interior lights illuminate when doors unlatch; Doors open even when buttons are turned off; Driver-side door tries to open on its own; Door sensor malfunctions, causing continuous chiming when door is actually closed
Repairs/costs cited: Parts must be ordered; repairs delayed; owner states dealer and warranty not concerned about safety
Recalls/TSBs owners mention: NHTSA investigation 2008 report #EA07019 determined no defect requiring recall; GM issued TSB #07-08-007 and #07-08-007 A-D to dealerships on how to repair problem
Horn Malfunction / Insufficient Contact Pressure
Horn requires excessive pressure to operate or does not work at all. When it does work, only specific spots on the steering wheel activate it—not where horn symbols are located. Problem appears widespread across multiple vehicles at dealerships.
When: Present since purchase or after a few weeks of ownership
Symptoms owners cite: Horn requires extreme force or pressure to activate; Horn works only in specific spots on steering wheel (e.g., left-hand corner only); Horn does not work where horn symbols are marked; Horn does not sound when pressed normally
Repairs/costs cited: Dealership installed redesigned spring kit (per GM recommendation); kit did not resolve problem
Recalls/TSBs owners mention: GM recommended redesigned kit installation; dealer noted many other Terraza customers have the same problem
Automatic Sliding Door Button/Keyless Entry Failure
Passenger-side or driver-side automatic sliding doors fail to unlock or open via keyless remote sensor or push button, or remain stuck in unpredictable states. Doors may then open independently and become extremely difficult to close.
When: At 47,308 miles (one documented case)
Symptoms owners cite: Sliding door will not unlock with keyless sensor; Sliding door will not open with button; Door opens independently when not commanded; Door becomes extremely difficult to close
Repairs/costs cited: Dealer traced problem to a circuit
Keyless Entry Remote Failure
Both keyless entry remote transmitters fail, with unlock function ceasing to work while lock operation remains intact. Replacement remotes quoted at $345.
When: Each remote failed after approximately 2 years of use
Symptoms owners cite: Keyless remote unlock function fails; Lock function continues to work; Problem repeats with replacement remote after 2 years
Repairs/costs cited: Replacement quoted at $345
Instrument Gauge Illumination Defect
Instrument gauge needles are not illuminated when ignition is on, only when ignition is off—violating federal regulations. A defective light sensor was identified as the root cause.
When: Present from early ownership (reported 1/19/2005)
Symptoms owners cite: Gauge needles not illuminated when ignition is on; Gauge needles illuminated when ignition is off
Repairs/costs cited: Defective light sensor found and addressed
Airbag Sensor and Deployment Malfunction
Airbag sensor light and deployment indicator remain on after front-end collision, signaling that airbag has deployed when it did not actually deploy.
When: After front-end accident
Symptoms owners cite: Airbag sensor light on; Airbag deployment light on; Airbag did not deploy despite sensors indicating deployment
Wiring Harness Damage and Electrical Faults
Wiring harness damage causes intermittent electrical failures, including sliding door chime sounding randomly while driving and requiring previous wiring repairs. Broader electrical issues noted throughout vehicle.
When: Intermittent throughout ownership
Symptoms owners cite: Sliding door chime sounds randomly while driving; Rattling noises from front end; Vehicle shakes excessively when braking at speeds over 45–50 mph
Repairs/costs cited: Previous wiring work completed
Starter Stuck or Frozen
Starter motor becomes stuck or frozen, preventing the engine from starting reliably. Owner reports the problem existed from day one (at 10 miles on new vehicle) and multiple owners report the same issue. No fix available and warranty may not cover it.
When: From 10 miles on new vehicle
Symptoms owners cite: Starter gets stuck or frozen; Prevents reliable engine start
Repairs/costs cited: No fix available per owner; warranty may not cover after initial period
Recalls/TSBs owners mention: No recall; dealer states warranty no longer covers problem
Brake System Responsiveness and ABS Malfunction
Brakes feel unresponsive, do not engage immediately, and occasionally fail to stop the vehicle properly. ABS light stays on continuously despite multiple dealer repairs and component replacements.
When: Intermittent throughout ownership
Symptoms owners cite: Brakes feel uneasy and unresponsive; Brakes do not respond right away; Owner had to pull to side of road to prevent accident; ABS light stays on continuously
Repairs/costs cited: Alternator replaced; many repairs done at dealership without resolving problem
Synthesized from 23 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
While driving down the road the rear door alarm started sounding and the rear power sliding door began to open. Pulled the car over shut the door and locked it. *tr
I was involved in an accident and had front end damage. The air bag sensor and light are on indicating that the air bag deployed; however, it did not. We have also experienced electrical problems as well with the van. The sliding door chime comes on randomly when I we are driving. Work had to be done previously on the wiring. Occasionally I hear rattling noises from the front end of the…
During cruise on highway (I-95 in florida) while on vacation the left rear power sliding door became unlatched and warning chimes sounded repeatedly and interior lights illuminated, this occurred several times again on this trip there was an investigation by the NHTSA in 2008 report #ea07019 which determined no defect was present which would require a recall. I beg to differ with that…
Had electrical trouble with your 2005 Buick Terraza?
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 2005 Buick Terraza?
It's a meaningful issue. 23 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 15 complaints that reported odometer mileage, most electrical failures cluster between 5,000 and 88,000 miles, with the median around 47,308. A quarter of owners report trouble before 5,000; a quarter make it past 88,000. 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/2005/Buick/Terraza.
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.