Why Your 2023 Chevy Blazer May Have A Dead Battery
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Some 2023 Chevy Blazer owners may encounter a no-start condition as a result of a dead battery, as well as intermittent cruise control operation, plus malfunctioning taillights that stay on after the brake pedal is released. Now, a possible cause behind these issues has been identified, as has a possible fix.
According to GM TechLink, this issue may be related to the brake pedal position sensor, or possibly a sticking brake pedal. In order to address this issue, GM is recommending that a GM technician first perform a battery draw test to determine the cause behind the dead battery. If the test does not find a draw, GM technicians should next check to see if the taillights on the 2023 Chevy Blazer stay illuminated after applying and releasing the brake pedal at various speeds. An assistant should watch the brake lights to determine if this is the case.
If the illuminated brake lights condition is duplicated, the technician should next perform a Brake Pedal Position (BPP) “learn” in both the Engine Control Module (ECM) and Body Control Module (BCM). Once this learn procedure as been performed, it’s recommended that the tech and an assistant once again attempt to duplicate brake light condition. If the condition is duplicated after performing the BPP learn, the brake pedal assembly will need to be replaced.
In the event that the illuminated brake light condition is not duplicated and no possible cause for a battery draw has been identified, technicians are instructed to only perform the BPP learn and update the BPP sensor calibration.
As a reminder, the 2023 Chevy Blazer is the fifth model year for the current-generation crossover, introducing a full model refresh. Two engine options are offered, including the turbocharged 2.0L I4 LSY gasoline engine and the naturally aspirated 3.6L V6 LGX gasoline engine. Under the skin, you’ll find the GM C1 platform, while production takes place at the GM Ramos Arizpe plant in Mexico.
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Wow how over complicated can it be? It used to be so simple when there was a $5 switch mounted to the brake pedal with a screw adjuster on it that operated the brake lights. It rarely failed but if it did, it took $5 and 5 minutes to fix in the driveway.
Yes, the ECM and BCM are now involved with all the previous “simple” functions. I was taken aback a bit when I realized that my 2021 GMC Sierra had a “simulator” attached to the brake pedal, with a high speed linear motor actually engaging the master cylinder piston.
How ridiculously over-complicated is that?! It’s no wonder the prices are so high.
This over-complicated crap has been going on for years. I had a new 2007 Impala LT that had a recall (it was on the Monte Carlo as well) for the remote start antenna. Apparently, there was a connection issue between the antenna and the base of the windshield if I remember correctly. That caused the remote start to only work when you were essentially standing on top of the car. I hadn’t yet received a recall notice when one day, my car showed a warning light that said my left rear tire went flat (0 psi) while I was on the highway. I pulled over to see that the tire was still fully inflated, but the flat tire indicator/alarm would not turn off. I called the Chevy Dealer in town and the service writer told me it was a problem with the remote start. It took my brain a while to compute the relationship between a remote start antenna and a tire pressure sensor at the back of the car. They replaced the remote start antenna, gave me two new remotes and all was well again.
What a PIA!
And now we are seeing what over complicated electronic systems are going to be like with these vehicles that have been made the past 10-12 years. The current ones of course have all the advanced electronic safety features added as well as upcoming driver-less aides, AI and telematics to name a few. Most people I know with these features on 3-5 year old cars outside of warranty like blind spot detection have had issues or outright failures that of course screw up other functions like starting the vehicle. And the cost to troubleshoot and repair this crap is most always in the thousands. It’s just going to keep getting worse!
It all starts at the top, replace Mary Barra.