The 2007 Trailblazer generates more electrical complaints than any single vehicle should. The driver door module—housing the power window and lock switches—is the worst offender. Owners describe burning plastic smells, visible arcing inside the module, dime-sized burn holes, and melted switch assemblies. In multiple cases, the module caught fire, filling the cabin with smoke. Some fires started while owners were driving with children aboard; one happened in the driveway while the family slept inside. The recall for this (Campaign 13V248000) covers some VINs but not others, even when owners experience the exact failure modes listed in the recall.
Windows stick in any position—some frozen up, others frozen down—and fail to respond to switches. Loss of driver-side control means children can open rear windows at will, a documented safety concern. The fuel gauge is a joke: it reads empty when the tank is full and fluctuates wildly. Low-beam headlights cut out suddenly while driving, forcing drivers to use high beams and potentially blind oncoming traffic. Instrument panel lights—check engine, traction control, tire pressure, ABS—illuminate and extinguish randomly with no pattern a dealer can diagnose.
Owners have had recalls performed, only to have different components fail immediately after. Dealers often claim new failures aren't related to the original defect, leaving owners chasing their tails through multiple service visits. Parts take months to arrive, and many owners report being denied coverage or reimbursement by GM because the recall was deemed "VIN-specific" despite owning the exact model year with the identical failure.
Failure modes owners describe
Driver door module arcing and fire
The driver-side door electrical module (DDM) or master window switch assembly arcs internally and ignites, producing smoke and burning plastic odor. Owners report white-hot arcing visible within switches, dime-sized burn holes in modules, and melted plastic housings. Fire can spread to door insulation and trim panels.
When: Various mileages; some early (18,000 km), others high (214,000 miles); incidents occur after 6+ years of ownership for many
Symptoms owners cite: Burning plastic or electrical smell from driver door; Smoke billowing from driver door panel; White-hot arcing inside switch module visible; Melted plastic casing and burned module housing; Dime-sized burn hole in module; Door panel temperature rise
Repairs/costs cited: Owners report replacing driver door switch module costs $405–$550 (parts and labor). Some dealers charged $425–$460.73 for replacement. Window regulator replacement reported at $150 (labor only, extreme weather conditions). Door panel and insulation replacement needed in fire cases. Parts distribution delays reported (2012–2013); GM stated parts unavailable until January 2013 in some cases.
Recalls/TSBs owners mention: NHTSA Campaign 13V248000 (Electrical System, Visibility) issued for 2005–2007 Trailblazers, but many owners report their VINs excluded. Recall 12180 addressed door moisture sealing but was a band-aid fix per owners. Some owners received recall notice; others did not. GM initially refused coverage after first recall service, citing previous repair. Later, owners report reimbursement promised if diagnosis repeated at owner expense ($100 diagnostic fee noted).
Driver-side window and lock control inoperability
Driver-side power window and door lock controls fail intermittently or completely, leaving windows stuck in any position. Failure often follows or coexists with electrical arcing/fire events, or occurs independently. Some windows stick partially down; others frozen up. Loss of driver control over child safety locks.
When: Ranges from early ownership to 7+ years; can be intermittent for weeks/months before complete failure
Symptoms owners cite: Driver window stuck in down position; Driver window stuck in up position; Window will not respond to button presses; Window operates intermittently (responds 1–2 times, then fails); Window operates very slowly; Window stalls mid-cycle; Driver-side door locks inoperative; Cannot lock rear windows from driver controls for child safety
Repairs/costs cited: Master window switch replacement cited at $200–$426; dealer diagnostic for switch failure $100. Window regulator replacement reported at various costs. Some owners have driven for over a year without repair due to cost ($500+ total). Dealers sometimes claimed unable to reprogram replacement switches.
Recalls/TSBs owners mention: GM acknowledged as common but coverage denial cited 'VIN-specific' recalls. Campaign 12V406000 and 13V248000 mentioned, but many owners excluded. Warranty expired for most used-car buyers. GM initially refused reimbursement after recall service, claiming new failure unrelated to original recall.
Fuel gauge inaccuracy and false empty reading
Fuel gauge shows inaccurate readings, most commonly stuck on empty or fluctuating wildly. Tank is full but gauge reads empty and low-fuel warning light illuminates. Gauge may improve briefly when vehicle idles, then drop again while driving.
When: Typically mid-to-late ownership; some owners report within 6 months of purchase, others after 3+ years
Symptoms owners cite: Gauge reads empty when tank is full; Gauge fluctuates between half-full and empty; Low-fuel warning light illuminates when tank is full; Gauge drops a quarter tank or more while driving, rises when idling; Gauge frozen on empty
Repairs/costs cited: One owner reported fuel pump and sending unit replacement; another cited $450 for fuel sensor/gauge repair. Dealers mentioned GM 50/50 cost-sharing program for this 'common' issue, though GM later denied coverage or reimbursement in many cases. Service Bulletin 10054B cited by owners as acknowledging premature fuel sensor wear.
Recalls/TSBs owners mention: GM acknowledged 'common problem' and initiated 50/50 cost-sharing program in some cases, but coverage was inconsistent and non-warranty vehicles denied. Service Bulletin 10054B exists but no full recall issued despite owner reports of premature sensor wear.
Headlight low-beam failure
Low-beam headlights fail suddenly and completely while driving, forcing driver to use high beams. Failure is intermittent, recurring 10–15 times over a year. High beams, fog lights, and daytime running lights function normally. Often attributed to headlamp driver module (HDM) failure.
When: Multiple incidents over months to years; some on same night repeated twice within one week
Symptoms owners cite: Low beams fail completely; everything goes dark; High beams work when low beams fail; Fog lights work when low beams fail; Daytime running lights functional; Failure occurs at night, often on winding roads or highways; Low beams work after vehicle sits and restarts
Repairs/costs cited: No repair costs cited by complainants; issue remains unresolved for many. Headlamp driver module (HDM) #45 melted in one case, ruining main fuse circuit board. No parts replacement mentioned as completed.
Recalls/TSBs owners mention: NHTSA Recall 14291 (Headlamp Driver Module Failure) issued, but many owners report VINs not included despite experiencing identical symptoms. GM customer service denied coverage citing VIN exclusion. Dealers unable to find problem or replicate issue during diagnostics.
Multiple intermittent electrical and dashboard warning lights
Instrument panel lights illuminate intermittently or remain on continuously: check engine, traction control, tire pressure, ABS, stability control, oil pressure, engine/powertrain lights. Lights may blink, flash, or stay lit for days before clearing without service. Patterns are erratic and not reproducible at dealer diagnostics.
When: Throughout ownership; some from day one, others after several years
Symptoms owners cite: Check engine light comes on and stays for days, then goes off; Traction control light intermittently on; Tire pressure light on when pressure is normal; ABS/stability control light on; Engine deceleration light on; Oil pressure light on; All dashboard lights illuminate at once intermittently; Beeping sounds when lights appear
Repairs/costs cited: Dealers diagnosed 'computer problem' and quoted $400 to repair, though one claimed 'electrical system patch' fixed it under warranty—problem recurred one week later. No definitive repairs reported as successful.
Recalls/TSBs owners mention: GM/dealers offered electrical system patch under warranty in at least one case, but repair was temporary. Warranty expired for most owners, leaving them responsible for diagnosis ($400+) without guarantee of resolution.
Window regulator failure and slow/stalling operation
Power window regulators fail, typically on driver and passenger sides. Windows move extremely slowly, stall mid-cycle, or stop responding entirely. One-touch auto-down function stops working. Problem may be mechanical regulator failure or electrical control failure.
When: Varies; some within 1–2 years of used-car purchase, others after longer ownership
Symptoms owners cite: Window operates very slowly; Window stalls mid-opening or mid-closing; One-touch auto-down function fails; Window completely inoperative; Passenger-side window regulator fails while driver side works; Multiple windows affected
Repairs/costs cited: Window regulator replacement cost $150 (labor only in cold weather) to $425+. One owner replaced regulator twice within couple of years, dealer offered only 1-year warranty on replacement part. Dealers blamed owner use or refurbished/defective parts.
Recalls/TSBs owners mention: No manufacturer response or recall noted for regulator-specific failures. Warranty denied or limited to 1 year on replacement parts.
Power door lock control failure
Door lock switches fail to operate or function intermittently. Driver cannot lock/unlock doors from driver-side controls. Keyless entry works inconsistently. Driver loses ability to control child safety locks on rear windows/doors.
When: Often concurrent with or shortly after door module failures; timing varies
Symptoms owners cite: Driver-side door lock switch non-responsive; Cannot lock rear windows/doors for child safety; Must manually lock driver door when exiting vehicle; Must manually unlock driver door with key; Keyless entry unlocks passenger and rear doors only
Repairs/costs cited: Typically replaced with driver door module (DDM); cost $405–$550. Fuses checked and found normal in several cases, indicating module-level failure.
Recalls/TSBs owners mention: Covered under Campaign 13V248000 for some VINs, excluded for others. Some owners received recall notice, others did not.
Engine stall and power loss while driving
Vehicle loses all power or stalls suddenly while driving at highway speeds. Anti-theft system flashes before failure. Engine shuts down repeatedly, intervals ranging from 8–10 miles to 40–140 miles between incidents. Vehicle can restart after key-off/key-on cycle.
When: Intermittent over weeks to months; one owner reported at 32,000 miles, another at unspecified mileage
Symptoms owners cite: Sudden complete power loss while driving; Anti-theft light flashes three times before loss of power; Engine stalls repeatedly at short intervals (8–140 miles); Brake pedal becomes hard after stall; Vehicle restarts after key-off/key-on; Check engine and stability lights illuminate during events
Repairs/costs cited: Dealer replaced ignition switch (internal short) and PCM module; also changed fuel tank sending unit. Wiring suspected as final cause after 6 weeks of troubleshooting. No resolution confirmed.
Recalls/TSBs owners mention: Dealer in contact with GM; GM unable to identify root cause or provide solution. No recall noted for this specific failure pattern.
HDM (headlamp driver module) melting
Headlamp driver module #45 in engine bay overheats and melts completely, destroying internal circuit board and main fuse circuit board. Electrical burning smell from engine area. Potential fire hazard.
When: 2015 in one report; timing variable
Symptoms owners cite: Headlights remain on after vehicle parked; Electrical burning smell from engine area; HDM module completely melted; Main fuse circuit board ruined by heat; Extreme heat radiating from module
Repairs/costs cited: HDM module replacement required; main fuse circuit board replacement needed. No cost cited by owner.
Recalls/TSBs owners mention: No recall or service bulletin mentioned for this failure.
Tire pressure monitoring system (TPMS) sensor failure
Tire pressure monitoring sensors fail prematurely and frequently. Sensors at individual wheels fail repeatedly, requiring replacement for each failed unit.
When: Recurring over ownership; first failure often within warranty period, subsequent failures outside warranty
Symptoms owners cite: Tire pressure light illuminates; TPMS sensor fails and does not function
Repairs/costs cited: Replacement cost approximately $200 per wheel sensor. Dealer advised owner not to bother replacing because sensors will fail again.
Recalls/TSBs owners mention: No recall issued despite acknowledged 'common problem' across Chevy/GM lineup. Dealer verbally acknowledged system is faulty and wished GM would install better system.
Climate control / HVAC malfunction
Air conditioning and heating system operates intermittently or uncontrollably. A/C works intermittently; rear A/C and heater non-functional or unreliable. Heater blows hot or cold air regardless of control settings. Climate control knob position does not correspond to output.
When: Various timing; some concurrent with electrical surge/arcing events
Symptoms owners cite: A/C only works intermittently; Rear A/C does not function; Rear heater non-functional; Heater blows hot air when set to off; Heater blows cold air when set to heat; Climate control gauge does not read past 2 on dial
Repairs/costs cited: No repair costs cited; issues remain unresolved.
Recalls/TSBs owners mention: No manufacturer response documented.
Erratic stereo system operation
Radio/stereo system behaves erratically: stations and settings change randomly, system powers on/off by itself, only one speaker works, system does not respond to controls.
When: Within 6 months of ownership in one case
Symptoms owners cite: Radio stations change randomly; Radio settings reset without user input; Radio powers on/off by itself; Does not power on/off as intended; Only one speaker functioning
Repairs/costs cited: No repairs completed or costs cited.
Recalls/TSBs owners mention: No response documented.
Side mirror auto-repositioning malfunction
Power side mirrors reset automatically when keyless remote unlocks the vehicle. Mirrors move to preset positions (Driver 1 or Driver 2) even after being manually adjusted and programmed. Mirrors reposition for 60+ seconds after unlock, often ending in non-aligned positions.
When: Persistent issue; recurs within 1 week of dealer repair
Symptoms owners cite: Mirrors reset when remote unlocks vehicle; Mirrors move randomly for 60+ seconds; Mirrors do not align to preset positions after movement; Mirrors realign incorrectly after programming
Repairs/costs cited: Dealer service provided twice; issue recurred within 1 week of each repair. Owner concerned motors will burn out.
Recalls/TSBs owners mention: Dealer performed repairs twice without permanent resolution.
Ignition switch internal short
Ignition switch shorts internally, causing anti-theft system to malfunction and vehicle power to cut out. Vehicle loses power at highway speeds.
When: At 32,000 miles in one report
Symptoms owners cite: Anti-theft system flashes; Complete power loss while driving; Vehicle stalls and restarts after key cycle
Repairs/costs cited: Ignition switch replacement performed by dealer at unknown cost.
Recalls/TSBs owners mention: Dealer performed replacement; manufacturer involvement unclear.
Cigarette lighter wiring fire
Wiring to cigarette lighter assembly catches fire inside vehicle. Separate fire incident from driver door module fires.
When: A few weeks after door module fire in one case
Symptoms owners cite: Wiring to cigarette lighter catches fire; Fire inside vehicle
Repairs/costs cited: Owner did not pursue dealer repair; paid out of pocket.
Recalls/TSBs owners mention: Dealer claimed no recall; owner paid out of pocket.
Key stuck in ignition
Ignition key will not release from the ignition switch. Owner must jiggle or wiggle key repeatedly to extract it.
When: One incident reported; timing unclear
Symptoms owners cite: Key will not turn or release from ignition; Requires repeated jiggling to extract key
Repairs/costs cited: No repair documented; issue may have resolved or owner worked around it.
Recalls/TSBs owners mention: No response documented.
Passive power window failure (window operates without ignition key)
Power windows operate or lower on their own when the vehicle is off and keys are not in the ignition. Windows go down and cannot be raised until vehicle is started and controls used.
When: Various; one incident during rainy weather, one during summer vacation
Symptoms owners cite: Windows go down by themselves with no key in vehicle; Windows lower gradually after entering vehicle; Windows stuck down for hours until vehicle restarted
Repairs/costs cited: One owner left vehicle without windows; windows raised themselves after restart. No repair costs cited.
Recalls/TSBs owners mention: No response documented.
Water intrusion from failed power window
Power window fails in down position, allowing rain and water to enter vehicle interior. Significant water damage to upholstery and interior. Occurs during precipitation events.
When: During or after rainstorms; one during thunderstorm
Symptoms owners cite: Driver window fails in down position; Water pours into vehicle interior; Interior becomes soaked
Repairs/costs cited: Interior water damage; repair costs not cited by owners.
Recalls/TSBs owners mention: Linked to Campaign 13V248000 in one case; parts unavailable for recall repair.
Lights dimming with power window operation
Cabin and dashboard lights dim noticeably when power window buttons are pressed. Electrical surge or undervolt condition when windows draw power.
When: Reported early in ownership
Symptoms owners cite: Interior lights dim when windows operate; Dashboard lights dim when windows operate
Repairs/costs cited: No repairs reported.
Recalls/TSBs owners mention: No response documented; dealer suggested battery was at fault.
Reduced engine power limp mode
Vehicle suddenly enters limp mode and speed reduces drastically (limited to 20 mph or less) while driving at highway speed. Power restriction unexpected; vehicle may continue in reduced-power state for extended periods.
When: One report during highway driving at 75 mph
Symptoms owners cite: Vehicle speed suddenly limited to 20 mph or less; Reduced engine power while at highway speed; Check engine light illuminated; No warning before restriction engages
Repairs/costs cited: No repair documented; owner scared of potential accident.
Recalls/TSBs owners mention: No response documented.
Synthesized from 179 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.