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HELP - Service Stabilitrak & Service Traction Control
July 18th, 2013, 8:51 AM
#81
Speaking from experience, 99% chance the scanner is gonna indicate a misfire. This by itself not very helpful - many things can cause a misfire. Does the problem go away at all or is it all the time? Does your Tahoe have AFM? My problem was caused by one of the AFM lifters sticking open - causing no compression - hence the misfire. Dealer replaced all of the lifters on that side of the motor. Weeks later same problem returned, in the end they wound up changing the plugs - problem solved.
July 18th, 2013, 9:30 AM
#82
CF Junior Member
Speaking from experience, 99% chance the scanner is gonna indicate a misfire. This by itself not very helpful - many things can cause a misfire. Does the problem go away at all or is it all the time? Does your Tahoe have AFM? My problem was caused by one of the AFM lifters sticking open - causing no compression - hence the misfire. Dealer replaced all of the lifters on that side of the motor. Weeks later same problem returned, in the end they wound up changing the plugs - problem solved.
July 18th, 2013, 10:13 AM
#84
CF Junior Member
- ACTIVE FUEL MANAGEMENT
In low-demand situations when full engine power is not needed, Active Fuel Management deactivates cylinders, effectively turning a V-6 or V-8 EcoTec3 engine into a fuel-sipping four cylinder<sup>7</sup>. When it senses the need for full power, AFM instantly re-engages all cylinders.
AFM deactivates cylinders, effectively turning an EcoTec3 engine into a fuel-sipping four cylinder.
July 18th, 2013, 3:03 PM
#86
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2007 Stabilitrak and Hard Gear Shift Problem
Been looking at past posts...Has anyone figured out this root cause for the traction control warning coming on, causing the transmission to shift very HARD? Has anyone had the problem resolved? What was done to fix it and how much was the total repairs?
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
July 18th, 2013, 3:13 PM
#87
Been looking at past posts...Has anyone figured out this root cause for the traction control warning coming on, causing the transmission to shift very HARD? Has anyone had the problem resolved? What was done to fix it and how much was the total repairs?
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
July 18th, 2013, 3:18 PM
#88
CF Junior Member
Been looking at past posts...Has anyone figured out this root cause for the traction control warning coming on, causing the transmission to shift very HARD? Has anyone had the problem resolved? What was done to fix it and how much was the total repairs?
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
I have a 2007 Silverado, 6.0L, the Service Traction control/Stabilitrak warning appears and causes the truck to shift out hard into 2nd gear and a little softer into 3rd. I had it serviced/diagnosed and got codes 0011 and 0521 fixed/replaced (oil pressure and cam actuator sensors). My engine light just came on again and I expect the Stabilitrak warning will come on and begin to hard shift. Any ideas or experience to resolve this issue? Dealer said it should have fixed the problem.
July 18th, 2013, 5:49 PM
#89
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It's a default condition created when certain errors are reported in the ECM. The computer is making the car behave like that. Fix the underlying problem and it will go away. IMO, this mode is used to get owners to come into the dealer for service. Like 91 Caprice said, get a scanner on the car and see what codes come back.
Makes a lot of sense...I have repaired the code issues now twice and my "engine light" came on again yesterday. I am planning to submit a complaint to corporate Chevrolet on the costs I have incurred to date on this...it will be interesting to see how much they care about their long-standing customers.