Dem lights are going out for about 30 seconds to a minute, then coming back on while driving on the road.
2007 Chevrolet Trailblazer lighting problems
moderate 135 complaints filed with NHTSA · avg repair $250 · see lighting across all vehicles →
Failure mileage
Complaints
135
Recalls
0
Avg fix
$250
2fires
When does it fail?
Of the 135 lighting complaints filed for the 2007 Chevrolet Trailblazer, 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
Of the 5 model years of Chevrolet Trailblazer we track for lighting problems, this one carries the most owner complaints on file — 135.
Owners have filed 135 lighting 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.
The failure pattern owners describe
Buyer takeaway: Low-beam headlight failures due to defective headlamp driver modules are widespread in 2007 Trailblazers, even though GM's recall excludes many affected VINs based on unclear criteria. Expect to pay $267–$400+ out of pocket for module replacement if your VIN isn't covered, and budget for potential repeat failures since aftermarket modules often fail within months.
Low-beam headlights and daytime running lamps fail intermittently or completely in these Trailblazers, while high beams keep working. Failures strike without warning during highway driving, city streets, and rural roads at speeds from 20 to 75 mph. Owners describe lights shutting off for 5–20 minutes, then mysteriously returning, or failing to turn on at all even after toggling switches and restarting the engine. Early failures are sporadic; over time they become frequent, sometimes progressing to permanent loss of function.
The culprit is almost always the headlamp driver module (HDM)—a solid-state relay that controls low-beam output. Dealers and independent shops consistently point to this part. Replacement runs $267–$330 for the module alone, with total bills often exceeding $400 when labor and reprogramming are added. Owners who replaced relays or fuses at auto parts stores report fixes lasting only 1–2 months before failure returned. One owner documented the HDM overheating badly enough to feel hot to the touch; lights returned after it cooled overnight. Another reported a melted fuse box alongside the module failure.
GM issued recalls 14V755000 and 15V519000 covering 2006–2007 Trailblazers, with coverage extended to 12 years or 150,000 miles. The problem: many owners with identical symptoms say their VINs don't appear in GM's database, so the company refuses coverage with no explanation. Once a vehicle crosses 150,000 miles, GM denies warranty help even with a recall letter in hand. Owners frustrated by repeated denials report being directed to file NHTSA complaints as the only avenue for appeal.
Same Chevrolet Trailblazer lighting reports on nearby years: 2005 · 2006 · 2008
Failure modes owners describe
Low-beam headlights and daytime running lamps intermittent failure or complete shutdown
Low-beam headlights and daytime running lamps fail to illuminate intermittently or completely, while high-beam headlights continue to work. Failures occur randomly during driving or at startup and may temporarily resolve after the vehicle sits or by toggling the light switch.
When: Across all mileage ranges from 31,600 to 219,000 miles; most commonly reported between 70,000–150,000 miles
Symptoms owners cite: Low-beam headlights fail without warning while driving at various speeds (20–75 mph); Daytime running lamps turn off intermittently; High-beam headlights and fog lights continue to work; Lights may flicker, then shut off for 5–20 minutes before returning on their own; Failure occurs more frequently over time; initially intermittent, progresses to frequent or permanent; Lights work at startup but fail once vehicle is in motion; Toggling the light switch sometimes restores function temporarily
Codes mentioned: Headlamp Driver Module (HDM) failure, Solid-state relay failure, Low-beam relay failure (relays 45/46)
Repairs/costs cited: Dealers and independent mechanics diagnose HDM module failure as root cause. HDM module replacement typically costs $267–$330 for part alone; some dealers quote $400+ including labor. Some owners replaced relays at auto parts stores (cost not specified), but failures recurred within 1–2 months. One owner reported fuse replacement (HCM Fuse #53) as temporary fix. One case involved melted fuse box. Module reprogramming at dealership required; aftermarket modules from auto parts stores failed quickly.
Recalls/TSBs owners mention: GM issued recall campaigns 14V755000 and 15V519000 for 2006–2007 Trailblazers with headlamp driver module issues; coverage extended to 12 years or 150,000 miles, whichever came first. However, many owners report their VINs are not included in recalls despite identical symptoms. GM refuses coverage if vehicle exceeds 150,000 miles or if VIN does not appear in recall database, with no explanation provided. Owners report GM opened case numbers but refused assistance. One dealer replaced relay under special coverage letter, then denied further coverage at 150,000+ miles. GM did not initiate service bulletins or warranty programs for non-recalled vehicles.
Headlamp driver module overheating
Headlamp driver module overheats during operation, causing it to shut down and fail. One case reported melted fuse box in addition to module failure.
When: No specific mileage or timeframe given; one case at 70,000 miles noted module was very hot to the touch
Symptoms owners cite: Module becomes very hot to the touch during operation; Lights shut off after running for a period of time; Lights return on after module cools (after several hours of sitting); Fuse box melted in one instance (no flames observed)
Codes mentioned: Headlamp Driver Module (HDM) overheat failure
Repairs/costs cited: One owner felt the HCM/HDM module and found it very hot; lights restored after it cooled overnight. Fuse box melting was observed in one case; vehicle was not repaired.
Recalls/TSBs owners mention: None documented for overheating issue specifically. General recall coverage applies to HDM failure, but mileage and VIN restrictions prevent many owners from accessing it.
Inadequate low-beam illumination
Low-beam headlights provide insufficient illumination for safe nighttime driving, requiring use of high-beam headlights instead. Distinct from complete failure; lights illuminate but at reduced output.
When: Reported at mileage 219,000
Symptoms owners cite: Low-beam headlights do not provide adequate illumination for safe driving; High-beam headlights provide adequate light; Condition persists even after module and fuse replacement
Repairs/costs cited: Owner replaced headlamp driver module and fuses but issue remained. Defect not further diagnosed.
Recalls/TSBs owners mention: Owner linked to NHTSA Campaign 15V519000 (Exterior Lighting) but vehicle not included in recall.
Synthesized from 135 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
Tl* the contact owns a 2007 Chevrolet trailblazer. While driving various speeds, the headlights failed without warning. The vehicle was taken to the dealer where it was diagnosed that the head lamp driver module failed and needed to be replaced. The vehicle was repaired. The VIN was not included in NHTSA campaign number: 15v519000 (exterior lighting). The manufacturer was not made aware of the…
Low beam lights stopped working while going down the road. ## VIN passed ## Chevrolet trailblazer 2007 ##
The headlights on the vehicle go out at random times, several times while driving at night the lights have gone out, the last time I was entering a highway and ended up using the high beams so I wouldn't go off the road. This is a very dangerous safety concern.
The low beam headlights randomly go off together when driving and often will not come back on for a short period of time. Have to use high beam after low beam goes off.
Had lighting trouble with your 2007 Chevrolet Trailblazer?
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 lighting problem on the 2007 Chevrolet Trailblazer?
It's a documented issue but not catastrophic. 135 complaints have been filed. Repairs average $250 and most owners catch it before it causes a breakdown.
At what mileage does the lighting typically fail?
Across the 122 complaints that reported odometer mileage, most lighting failures cluster between 80,000 and 149,000 miles, with the median around 116,383. A quarter of owners report trouble before 80,000; a quarter make it past 149,000. 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 $250 for lighting 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 lighting?
No active recalls currently cover lighting 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/2007/Chevrolet/Trailblazer.
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.