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When I drive down the road it will not let me go over 55mph like it going in limp mode it still under warranty the dealer ship said it was the air filter so I payed 60 for the filter and pay them 300 to do it well that never fix the problem now they don't know what's going on with it so they told they will let me know if they come up with something ........so if anyone got any idea let me know thank
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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I would report them to the BBB and file a complaint with GM. I would also go to a different GM dealership for warranty work since they are clearly incompetent. You should have never been charged anything to fix the problem.
 

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I would report them to the BBB and file a complaint with GM. I would also go to a different GM dealership for warranty work since they are clearly incompetent. You should have never been charged anything to fix the problem.
When I drive down the road it will not let me go over 55mph like it going in limp mode it still under warranty the dealer ship said it was the air filter so I payed 60 for the filter and pay them 300 to do it well that never fix the problem now they don't know what's going on with it so they told they will let me know if they come up with something ........so if anyone got any idea let me know thank
You did not indicate how many miles you have on the car. Certainly if your mileage is not excessive, it should still be under warranty and there is no way on earth you should have to pay for the air filter and labor (especially the labor) Go back to the dealership, speak to the service department manager, and get an explanation why this is not covered under warranty. Tell him/her that if is not covered you want a letter saying so that you can contact BM (look in your manual for list of contact phone numbers) and report him. Also, you are NOT restricted to the dealership where you purchased the car. Go to another Chevrolet dealer, explain the situation and have them look at the problem. There are so many possibilities that could cause the problem of not going over 55. But it sure sounds like a software issue related to your cruise control that somehow locks you into that maximum speed.
 

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2022 Chevrolet Trailblazer RS
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Roger, first off, what year and how many miles do you have on your TB?

An air filter can be considered normal wear and tear item and is not covered under warranty. Unless its within the first 12 months or 12000 miles.
 

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You did not indicate how many miles you have on the car. Certainly if your mileage is not excessive, it should still be under warranty and there is no way on earth you should have to pay for the air filter and labor (especially the labor) Go back to the dealership, speak to the service department manager, and get an explanation why this is not covered under warranty. Tell him/her that if is not covered you want a letter saying so that you can contact BM (look in your manual for list of contact phone numbers) and report him. Also, you are NOT restricted to the dealership where you purchased the car. Go to another Chevrolet dealer, explain the situation and have them look at the problem. There are so many possibilities that could cause the problem of not going over 55. But it sure sounds like a software issue related to your cruise control that somehow locks you into that maximum speed.
There is another post on this forum by someone who could not get their TB above 30. Dealer found the problem to be the Throttle position sensor pigtail got wet inside and was not functioning correctly. Here is what a TPS is:
The TPS is mounted on the throttle body and converts the throttle valve angle into an electrical signal. As the throttle opens, the signal voltage increases. ... A ground wire from the TPS to the E2 terminal of the ECM completes the circuit. At idle, voltage is approximately 0.6 - 0.9 volts on the signal wire.
 

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There is another post on this forum by someone who could not get their TB above 30. Dealer found the problem to be the Throttle position sensor pigtail got wet inside and was not functioning correctly. Here is what a TPS is:
The TPS is mounted on the throttle body and converts the throttle valve angle into an electrical signal. As the throttle opens, the signal voltage increases. ... A ground wire from the TPS to the E2 terminal of the ECM completes the circuit. At idle, voltage is approximately 0.6 - 0.9 volts on the signal wire.
You can see TPS voltage clearly with a scanner and you can see if the signal is linear or erratic which would also indicate a problem with the sensor. Most TPS max out around 5.0 volts at WOT.
 
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