Where is the throttle under hood for manual revving - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 08-05-2019, 10:13 PM
rplieth rplieth is offline
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2009 Chevy TrailBlazer LT
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Where is the throttle under hood for manual revving

Hi, I searched for a bit and couldn’t find a quick answer. Can someone guide me to where the throttle cable/linkage is where I can rev the engine under the hood vs pedal?
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Old 08-05-2019, 11:14 PM
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EnvoyBoy2004 EnvoyBoy2004 is offline
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These are drive-by-wire vehicles, there is no wire or cable. The computer controls the throttle body based on the accelerator pedal position.
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Old 08-06-2019, 08:56 AM
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TB-Al TB-Al is offline
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Not only is there no throttle cable, there isn't a distributer where you can change the timing and dwell or a carburetor where you can adjust the idle speed and choke. Sorry to inform you but you have been replaced by a computer.

Hint: I use a piece of 1x2 and a small spreader wedged against the seat to hold the RPM up.
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Old 08-06-2019, 07:36 PM
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Old 08-07-2019, 07:55 PM
emcee99 emcee99 is offline
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From the manual:

"Fuel System
A new electronic throttle control system is used on the engine. A throttle actuator control or TAC system eliminates cable linkage from the pedal to the throttle control module. All throttle movements are controlled by the PCM."

There are some values related to throttle position and RPM in the Torque app GM pid's - one is "Desired Idle Speed". However, they aren't active with my cheapo scan tool. Maybe a better scan tool would allow you to command a change to one of these values.
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