- Jun 22, 2013
- 249
Started the voy and both light came on. I did not drive, just turned off the car and restarted it . Lights are gone. 101k miles.
What's up ?
What's up ?
the roadie said:Many times, it's a corroded ground lug down on the frame rail under the driver's area where the control module gets grounded. Run a search - been discussed a few times.
the roadie said:Many times, it's a corroded ground lug down on the frame rail under the driver's area where the control module gets grounded. Run a search - been discussed a few times.
HARDTRAILZ said:I do not remember ever seeing this. I had always read it was the steering position sensor. I will check my ground since I get the light occasionally.
JayMorals said:I picked up a 2007 GMC Envoy Denali 2wd in July that has 89,000 miles. About a month ago, when the weather really started to cool off, the "service stabilitrak" message and light started to intermittently go off. After some research I took the Envoy into AutoZone. They hooked up their scanner which could read EBCM codes, which I can't do with mine at home. The code (C0455) indicated that the Steering Wheel Position Sensor needed to be replaced. Bought one and finally replaced it yesterday. Getting to it wasn't too difficult, but coaxing it out of position on the shaft required a balance of persistence and patience. I found that with a small screwdriver I could reach the back side of the sensor through some holes in the plastic framing and gently tap it forward off the shaft.
Took the Envoy out for a drive and got the same message and light within about 8 minutes. Frustrating. Now after more online research I've come up with some alternatives to try. First, I'm going to locate and clean the ground mentioned earlier in this thread. It would appear to be the cheapest and easiest possible solution. The other solutions that I've identified are replacing the ignition switch, flushing the brake fluid, replacing the battery, and always parking with the wheels straight.
I don't think that parking with the wheels straight is a fix for me. It is already parked in my garage each night with the wheels straightish...
Another site, I think for full sized GMC trucks, mentioned that dirty brake fluid could be the culprit (which makes no sense to me). I may choose to do this simply because I haven't since I've owned it and doubt that the dealership that cared for this Envoy before it came to me, ever changed the fluid out.
Replacing the ignition switch intrigues me and may be my follow on attempt to fix. My key hangs up in the ignition sometimes and I wonder if there is an intermittent ground or something that is pissing off the ECM in there on occasion. I wasn't able to predictably recreate the message and light, but initially thought that it was tied to braking and turning the wheel at the same time.
Replacing the battery also interests me. The battery drained flat while I was gone for 17 days in September. Even before then I noticed that the starter sounded like it turned a bit slower if the vehicle sat for 2 or 3 days. I've had previous issues with a Jeep Grand Cherokee Limited and a Chrysler Concorde that just started doing weird things when the battery began to dip with age. Both are electrically demanding vehicles much like the Envoy and my impression is that without a solidly perfect battery with clean power, the gremlins will eventually find a way to annoy you. A new battery solved odd, intermittent sensor issues in both of those vehicles despite the fact that the battery tested "good" at a service center (which the Envoy has done as well).
Update: Visited AZ again today and had them check the battery again for grins. It reads 12.3 just sitting (just a bit low). When I started it up, the service member raised an eyebrow and said, "I've never seen that before". The alternator is overcharging at 15.3 volts. I'll have to sort that first...
Any guidance would be appreciated, as this is clearly an issue that GM hasn't been able to isolate and fix yet.
Thanks!
I asked a mechanic friend about my stabilitrak putting me into limp mode issues. He said he'd worked on one before and there are issues with voltages not being where they should be. He said a temp fix for me could be to unplug the power to the radiator fan clutch. It's the 5 or so wire connection mounted near the top of the fan shroud on the driver's side. I unplugged mine and my service stabilitrak light is gone and I'm out of limp mode.I picked up a 2007 GMC Envoy Denali 2wd in July that has 89,000 miles. About a month ago, when the weather really started to cool off, the "service stabilitrak" message and light started to intermittently go off. After some research I took the Envoy into AutoZone. They hooked up their scanner which could read EBCM codes, which I can't do with mine at home. The code (C0455) indicated that the Steering Wheel Position Sensor needed to be replaced. Bought one and finally replaced it yesterday. Getting to it wasn't too difficult, but coaxing it out of position on the shaft required a balance of persistence and patience. I found that with a small screwdriver I could reach the back side of the sensor through some holes in the plastic framing and gently tap it forward off the shaft.
Took the Envoy out for a drive and got the same message and light within about 8 minutes. Frustrating. Now after more online research I've come up with some alternatives to try. First, I'm going to locate and clean the ground mentioned earlier in this thread. It would appear to be the cheapest and easiest possible solution. The other solutions that I've identified are replacing the ignition switch, flushing the brake fluid, replacing the battery, and always parking with the wheels straight.
I don't think that parking with the wheels straight is a fix for me. It is already parked in my garage each night with the wheels straightish...
Another site, I think for full sized GMC trucks, mentioned that dirty brake fluid could be the culprit (which makes no sense to me). I may choose to do this simply because I haven't since I've owned it and doubt that the dealership that cared for this Envoy before it came to me, ever changed the fluid out.
Replacing the ignition switch intrigues me and may be my follow on attempt to fix. My key hangs up in the ignition sometimes and I wonder if there is an intermittent ground or something that is pissing off the ECM in there on occasion. I wasn't able to predictably recreate the message and light, but initially thought that it was tied to braking and turning the wheel at the same time.
Replacing the battery also interests me. The battery drained flat while I was gone for 17 days in September. Even before then I noticed that the starter sounded like it turned a bit slower if the vehicle sat for 2 or 3 days. I've had previous issues with a Jeep Grand Cherokee Limited and a Chrysler Concorde that just started doing weird things when the battery began to dip with age. Both are electrically demanding vehicles much like the Envoy and my impression is that without a solidly perfect battery with clean power, the gremlins will eventually find a way to annoy you. A new battery solved odd, intermittent sensor issues in both of those vehicles despite the fact that the battery tested "good" at a service center (which the Envoy has done as well).
Update: Visited AZ again today and had them check the battery again for grins. It reads 12.3 just sitting (just a bit low). When I started it up, the service member raised an eyebrow and said, "I've never seen that before". The alternator is overcharging at 15.3 volts. I'll have to sort that first...
Any guidance would be appreciated, as this is clearly an issue that GM hasn't been able to isolate and fix yet.
Thanks!