2003 Chevrolet Blazer Electrical system Problems
- Complaints
- 9about this part
- Share
- 12%of 77 total for the year
- Median mileage
- 48,774miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the electrical system of the 2003 Chevrolet Blazer, 12% of the 77 complaints for this model year. Where a mileage was given, the median is 48,774 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“1. Speedometer acting erratically. 2. Dealer wanted to charge $450 dollars to change speed sensor. I told him he was crazy. They reconnected. Speedometer stared working again. 3. 7 months later speedometer starts acting erratically. I search websites and find that many other owners of 2003 tahoes experience the same thing. Ordered new speed sensor to for self installation. Yet to install. 4. Speedometer starts working again after battery changed. 5. Runs for 5 days working fine then act erratic again. 6. Ready to change. 7. Thought I'd complain first. …”
NHTSA complaint #10167309, filed 2006-09, 37,000 miles“Brake lights fail to turn on when brake pedal is pressed. Replaced brake switch, all tail lights. Mechanic investigation shows multi-function switch to be cause of problem as in previous recall for multi-function switch on 2002 Blazer. Requesting investigation and addition to the recall.”
NHTSA complaint #10429396, filed 2011-10, 155,984 miles“Vehicle stalled while driving, but will restart when key was turned in the ignition. Vehicle was serviced 5 times in which a diagnostic test was performed, no failure code found. Then, dealership removed the automatic starter system, and the vehicle only stalled once. A year later, the service engine light came on while driving. Dealership replaced the computer chip, but the light came back on.”
NHTSA complaint #10115414, filed 2005-03, 300 miles“The was a sensor on the dash which controlled the headlights. When the vehicle was under a tree or in the garage, the headlights went dim. The dealer stated there was a code to over ride the system. The dealers had no access to the code. The sensor on the dash turned down the dash lights which made it impossible to read the instrument panel. At dusk the high beams came on without the driver's knowledge. The consumer is looking for the code that will allow the light to operate manually.”
NHTSA complaint #10055911, filed 2004-02, 13,000 miles“The contact owns a 2003 Chevrolet Blazer. The contact stated after several attempts starting the ignition, the engine failed to operate. The vehicle was towed to the residence. The vehicle was diagnosed by a certified mechanic, who informed that the starter relay switch would need to be replaced. The vehicle had not been repaired. The manufacturer was not notified of the problem. The approximate failure mileage was 115,000.”
NHTSA complaint #10619333, filed 2014-08, 115,000 milesRelated service bulletins
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- 10244214Sep 21, 2023This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- 10225615Oct 19, 2022This service bulletin provides information on Module Harvesting.
- 10198890May 25, 2021This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or…
- 10176649May 20, 2020This informational bulletin provides information for the IPC odometer programming method quick reference guide.
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- 10167434Oct 10, 2019This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challenging complaints to accurately…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 11 | 32% |
| 2024 | 7 | 13% |
| 2023 | 7 | 16% |
| 2022 | 20 | 37% |
| 2021 | 40 | 28% |
| 2020 | 78 | 35% |
| 2019 | 62 | 33% |
| 2008 | 1 | 20% |
| 2006 | 2 | 11% |
| 2005 | 4 | 27% |
| 2004 | 10 | 20% |
| 2003 | 9 | 12% |
| 2002 | 21 | 9% |
| 2001 | 40 | 12% |
| 2000 | 49 | 8% |
| 1999 | 40 | 9% |
| 1998 | 71 | 10% |
| 1997 | 89 | 12% |
| 1996 | 62 | 5% |
| 1995 | 70 | 6% |
| 1994 | 10 | 2% |
| 1993 | 17 | 3% |
| 1992 | 18 | 6% |
| 1991 | 16 | 7% |
| 1990 | 4 | 13% |
| 1989 | 6 | 16% |
| 1988 | 5 | 13% |
| 1986 | 1 | 5% |
| 1985 | 1 | 3% |
Other parts of the 2003 Chevrolet Blazer
14 complaintsBody and structure
12 complaintsTransmission and drivetrain
12 complaintsFuel system
10 complaintsBrakes
8 complaintsEngine cooling
6 complaintsExterior lighting
4 complaintsSuspension
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsSteering
3 complaintsEquipment
2 complaintsInterior lighting
2 complaints
← All problems reported for the 2003 Chevrolet Blazer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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