2005 Chevrolet Trailblazer EXT 370 Electrical system Problems
- Complaints
- 101about this part
- Share
- 43%of 237 total for the year
- Median mileage
- 73,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 101 complaints about the electrical system of the 2005 Chevrolet Trailblazer EXT 370, 43% of the 237 complaints for this model year. Where a mileage was given, the median is 73,000 miles. 1 of these say a crash was involved and 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have 2005 Chevrolet trailblazer 4wd ext ls 4.2 liter. I noticed over past 3 years that I be at drive through for burgers and etc. The car would cut off. I did not think much of it at the time. It has gotten critically worse. It would cut off in middle of the highway, drive throughs and etc. During the past two years I have re the luster and over head dome light flicker. …”
NHTSA complaint #11100524, filed 2018-06, 81,000 miles“I have a 2005 chevy trail blazer the lights would flicker at night thought was battery had it checked out the battery was bad that was back in sept. Then around jan I am driving down the road and doing 70 on the interstate and my speedometer goes from 70 to 120 MPH and then goes down to neutral lights are flicking again as well and battery is fine.”
NHTSA complaint #10303521, filed 2010-02, 91,000 miles“At this time the speedometer started misreading and continues through today. Then the fuel gauge stopped reading and after that the oil pressure gauge & amp gauge started misreading. I talked to the local Chevrolet dealership and they told me I would have to pay for the repairs.”
NHTSA complaint #10604954, filed 2014-06, 12,500 miles“I have had the following problems with my 2005 chevy trailblazer ext ls: 2008: fuel sensor failure, running board fell off 2009: head and tail lights going out frequently, windows would get stuck- could not go up or down- all dash lights flashing, car stalling out- needed circuit board replaced. Anti-theft non-functioning. …”
NHTSA complaint #10376545, filed 2011-01, 74,000 miles“I own a 2005 trailblazer ext and the speedometer does not work. It is a chronic problem according to research that I have conducted. It is a safety issue as well. Gm needs to take responsibility and recall the instrument cluster. The speedometer fails everytime that I drive it. The dealership stated that the cluster is going to run about $400, which does not include labor.”
NHTSA complaint #10379941, filed 2011-02, 50,000 milesRelated service bulletins
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- 11002312Jun 6, 2024This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414…
- 11000162Apr 30, 2024The 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…
- 10252735Mar 28, 2024This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
- 10244214Sep 21, 2023This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- 10239102Jun 29, 2023The 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…
- 10225615Oct 19, 2022This service bulletin provides information on Module Harvesting.
- 10222776Sep 16, 2022The 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…
- 10168969Nov 20, 2019This Preliminary information communicates information for setting up the SDM.
- 10190320Oct 1, 2017IPC Odometer Programming Method Quick Reference Guide
Electrical system: other model years
Other parts of the 2005 Chevrolet Trailblazer EXT 370
94 complaintsExterior lighting
15 complaintsVisibility (wipers, defrost, mirrors)
12 complaintsEngine cooling
10 complaintsVehicle speed control
8 complaintsAir bags
7 complaintsBody and structure
6 complaintsTires
5 complaintsTransmission and drivetrain
5 complaintsEngine
4 complaintsEquipment
4 complaintsLatches, locks and linkages
4 complaints
← All problems reported for the 2005 Chevrolet Trailblazer EXT 370
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology