Throttle position sensor failure - 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 Vortec 5.3L V8 Engine and Drivetrain > OEM Issues

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Old 05-25-2010, 11:05 PM
Benzoid123 Benzoid123 is offline
Junior Member
2005 GMC Envoy SLT XUV
Carbon Black Metallic 5.3L V8 2WD
Join Date: May 2010
Location: Los Angeles
Posts: 1
Throttle position sensor failure

Greetings to all! I'm researching about this TPS failure code on my friend's 2005 GMC Envoy SLT XUV with about 50k on the truck. I'm pretty sure she has the 5.3 V8. So, I've been researching on this forum and even bought a Chilton's manual. It seems the TPS is inside the throttle body. I've read that the throttle body can/should be cleaned. Looking at the manual, removing the throttle body doesn't appear too daunting. What I can't seem to find is HOW to clean it. Also is it possible that this could turn the idiot light off or is the sensor inside the TB toast, end of story=Replace the whole TB. Also, to add to my confusion, is "Fuel Injection Air Meter Body" the same as "throttle body"? I found the part number 12580760 from GMpartsdirect. Much better price than what the stealership quoted. My friend has been under a great deal of financial hardship so I'm trying to see if I can figure this mystery out myself.

I can't believe how complicated this truck is! It's absolutely amazing to me considering I personally drive a 28-year-old turbo-diesel Mercedes. It's about as simple as a Model T Ford!

Thanks in advance.
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Old 05-26-2010, 12:29 AM
WOOLUF1952 WOOLUF1952 is offline
No longer with us
2003 GMC Envoy SLT
Magnetic Red Metallic 4.2L I6 4X4
Join Date: Jul 2008
Location: Milwaukee, WI
Posts: 7,190
This is for the I6 engine:

The V8 doesn't have the same problem:, however cleaning the t-body is cheap and couldn't hurt.
[COLOR=red]Oh, what a tangled web we weave, when first we practice to deceive. :([/COLOR]
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Old 09-27-2013, 11:43 AM
Tainstve Tainstve is offline
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qwerty qwerty qwerty
qwerty 6.0L LS2 V8 2WD
Join Date: Sep 2013
Location: Palo Alto, USA
Posts: 16
I really liked this*information.

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