2004 Isuzu Ascender Electrical system Problems
- Complaints
- 34about this part
- Share
- 53%of 64 total for the year
- Median mileage
- 80,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 34 complaints about the electrical system of the 2004 Isuzu Ascender, 53% of the 64 complaints for this model year. Where a mileage was given, the median is 80,000 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While driving my cars brakelight came on and the car started to accelerate faster and faster. Pullled over as soon as I could and stopped the car and turned the engine off. The check gauges warning light comes on even when the car is sitting idle or when I pull up and stop at a red light it comes on.”
NHTSA complaint #10862149, filed 2016-04, 144,455 miles“Abs and brake warning lights and warning chime comes on every time we drive the car. The chime will go off after about 15 sec. Of chiming. Lights and warning on the readout stay on. Our mechanic said its the ABS module and GM doesn't have any. They have been on backorder for at least 8 months. He said it's a problem with like GM vehicles also. This is a safety hazard. Don't know to take it seriously or not. Don't know if our brakes are going to work. We need this fixed and we can't even get a part. Help!!”
NHTSA complaint #10520243, filed 2013-06, 135,000 miles“The speedometer in my 2004 Isuzu Ascender which is a GM product is giving false readings and shows higher and/or slower speeds than the correct speed. I am aware that this is a nationwide complaint among other GM product owners. The dealerships are refusing to fix it, citing out of warranty excuses and saying that it is not a safety issue. It is in fact, a safety issue and should be fixed at no cost to the consumer.”
NHTSA complaint #10212477, filed 2007-12, 25,700 miles“While driving one night, my left headlight went out, first the dim, then the bright. My wife and I both smelled a smell like rubber burning, so I stopped the car and checked under the hood to detect the origin of the smell, but to no avail. Not much later that same night, my right headlight also burned out. Luckily, we were only 1 mile from our house and limped home. When I checked under the hood the next day, I found that the electrical connections to both headlights had burned and melted the wires at the point where they attach to the back of the headlight assembly. …”
NHTSA complaint #10460444, filed 2012-06, 122,348 miles“Just to let you know. Gmc envoy, chevrolet trailblazer, buick rainier, oldsmobile bravada, saab 9-7x, Isuzu Ascender they are all exactly the same vehicle that has just been rebadged. I personally drive a 2004 Isuzu Ascender, and I can't get GM , chevy, or Isuzu to fix it without charging me $475. My tachometer always reads wrong. My speedometer sometimes reads wrong and my gas gauge does not give me the correct reading. This can be real dangerous. The speedometer issue is more wide spread than you guys think.”
NHTSA complaint #10214347, filed 2008-01, 25,000 milesRelated service bulletins
- 10141371May 23, 2018This Preliminary Information communication provides information to the technician about connectivity concerns when connecting an Apple device via USB cord. Technician should…
- 10125106Nov 7, 2017This Preliminary Information communication provides information to the technician about vehicle's odometer appears to be inaccurate relative to a known distance traveled…
- 10097132Sep 14, 2016This preliminary information communication provides information to the technician about vehicles that have an onstar system that will not power up. Technician should turn off the…
- 10114470Apr 17, 2015This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue…
- 10094888Jan 14, 2015This preliminary information communication provides information to the technician the steps needed to diagnose and repair the vehicles that may have unwanted or phantom phone…
- 10135337Oct 17, 2014This Preliminary Information communication provides information to the technician about vehicles that are travelling from Canada to the United States. While in the United States…
- 10112664Dec 13, 2012This Preliminary Information communication provides information to the technician about vehicles may have a no power or no connect concern. Technician will find that the OnStar…
- 10112528Nov 1, 2012This Preliminary Information communication provides information to the technician about vehicles that during battery parasitic drain test, there may be some confusion as to what…
- 10023774Dec 1, 2007Abs, red brake, svc and 4wd light on, hvac blower inoperative.
- 10023761Dec 1, 2007Dtc c0327 with or without additional dtc's setting. With 4wd.
Electrical system: other model years
Other parts of the 2004 Isuzu Ascender
17 complaintsExterior lighting
6 complaintsEngine
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBrakes
3 complaintsSeat belts
3 complaintsEngine cooling
2 complaintsBody and structure
2 complaintsTires
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsEquipment
1 complaints
← All problems reported for the 2004 Isuzu Ascender
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