Car Fix DIY Videos

This video will show you how to diagnose and replace a faulty throttle position sensor on a 2006 Hummer H3 3.5 engine. The procedure is almost exactly the same for any inline GM engine: 4cyl, 5cyl, 6cyl etc. These engines are found in various model trucks, SUVs and GM cars.

“SERVICE STAB SYS TRACTION FAILED – REDUCED POWER” Code P2135

I had to replace the throttle body on my 2006 Hummer H3 today so I made a quick video. It was showing on the display “Service Stab Sys Traction Failed – Reduced Power” message. The “Reduced Power” part was very noticeable.

This usually happens when your vehicle has a code P2135 registered, if you’ve got a “Service Stab Sys Traction Failed – Reduced Power” message on your display, there are only a few reasons your vehicle will have a P2135 Code and the “Stab Sys Failed” message. The most likely is the throttle body, which I’m replacing here. The other possible reasons for a P2135 Service Stab Sys Failed Reduced Power message are limited to the accelerator pedal position sensor, (which you’ll have to replace the entire pedal but it’s easy too) OR, you have a wiring harness/connector issue. GM sent out a bulletin about dirty connectors a few years ago. Some of these P2135 codes could be corrected by removing the wiring harness connector from each component, cleaning inside the connectors with a few sprays of tuner cleaner or electronic cleaner and it’s recommended to use a dielectric grease in the connector before plugging the part in. (I don’t do the grease personally as it can attract and trap moisture and cause new issues.) If you’re doing the throttle position sensor/throttle body, it’s an easy task that can be done by anyone in about 20 minutes, here’s the proof. Even those that are not “mechanically inclined” can perform this task easily with just a few basic tools. Luckily, it’s also the exact same procedure for Trailblazers and most other GM inline engines found in their line of SUVs, 4cyl, 5cyl, 6cyl, 8cyl, doesn’t matter, it’s mostly the same on all GM throttle bodies. I apologize for the traffic noise in the background, poor audio and my never ending sniffles (allergies were killing me) Thanks for watching and if this video helped you any, why don’t you consider smashing the thumbs up button and throw a comment and a subscribe my way to help others find me in the search engine. Thanks, Chris

Battery Quick Disconnect I Use Comes in a 2 pack https://www.amazon.com/gp/product/B08SVRX678?ie=UTF8&psc=1&linkCode=ll1&tag=kentuckyfried-20&linkId=c20f6e20821e1a5ec1937bea8ed9bcd6&language=en_US&ref_=as_li_ss_tl

ACTRON CP9125 Scan Tool : https://www.amazon.com/Actron-CP9125-PocketScan-Reader-Vehicles/dp/B0007LEG2K?crid=3M0G4KM114UV2&keywords=actron+cp9125&qid=1657888229&sprefix=actron+cp9125%2Caps%2C82&sr=8-1&linkCode=ll1&tag=kentuckyfried-20&linkId=5251a4e306a424237c4459b0c99d3018&language=en_US&ref_=as_li_ss_tl

Dorman Throttle Body 2006 Hummer H3 and others: https://www.amazon.com/Dorman-977-017-Throttle-Assembly-Select/dp/B082P6PHVT?crid=2MWBT5RP9W5DU&keywords=2006+hummer+h3+throttle+body&qid=1653649814&replacementKeywords=throttle+body&sprefix=2006+hummer+h3+throttle+body%2Caps%2C68&sr=8-5&vehicle=2006-93-2805————&vehicleName=2006+Hummer+H3&linkCode=ll1&tag=kentuckyfried-20&linkId=b961368f22f3d4959cefc3c622d83586&language=en_US&ref_=as_li_ss_tl

Just make sure you get the Lifetime Warranty parts in case it happens again down the road at least your replacement parts won’t cost you if there’s a 2nd time around.