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Title : Chevy Suburban Reduced Engine Power Running Rough Fixing it

This is my mom's Chevy Suburban that recently started having running problems. The engine gets reduced engine power, and runs ragged. It happens while driving, and it has happened 4 times now. If you have any ideas about this, please tell me.
More videos later.

Update. Shortly after filming this, I found a GM service bulletin on this problem. It said the problem had to do with the throttle position sensor being out of sync with the CPU.
We took it into the dealer, and I wrote the specific bulletin number on a piece of paper and sent it in with the car. It was fixed under warranty, and the Chevy hasn't acted up since.
Here is the service bulletin;
Bulletin No.: 11-06-04-007B

Date: April 16, 2012

Subject: Diagnosis and Repair - Malfunction Indicator Lamp (MIL) Illuminated, Reduced Engine Power Message Displayed, DTC P2135 Set

2008-2011 Cadillac Escalade, Escalade ESV, Escalade EXT
2009-2011 Cadillac Escalade Two-Mode Hybrid
2008-2009 Chevrolet TrailBlazer
2008-2011 Chevrolet Avalanche, Colorado, Express, Silverado, Suburban, Tahoe
2008-2011 Chevrolet Tahoe Two-Mode Hybrid
2009-2011 Chevrolet Silverado Two-Mode Hybrid
2008-2009 GMC Envoy
2008-2011 GMC Canyon, Savana, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon XL Denali
2008-2011 GMC Yukon Two-Mode Hybrid
2009-2011 GMC Sierra Two-Mode Hybrid
2008-2009 HUMMER H2
2008-2010 HUMMER H3
Equipped with Engine RPO LFA, LY2, L20, LMG, LC9, LH6, LMF, LH8, LH9, L76, LS2, LY5, LY6, L92, L96, LZ1, L94 or L9H

If a vehicle is encountered with this condition, DO NOT replace the throttle body. Instead follow this procedure below. Model Year 2008-2010 vehicles MUST have the engine control module (ECM) reprogrammed with the latest software calibration as indicated in Step 35 of the procedure AFTER the installation of the throttle position (TP) sensor cover. Model Year 2011 vehicles DO NOT need to have the ECM reprogrammed.
This bulletin is being revised to add California Emission Coverage to the Warranty Information. Please discard Corporate Bulletin Number 11-06-04-007A (Section 06 - Engine/Propulsion System).

Some customers may comment on an illuminated malfunction indicator lamp (MIL), with a Reduced Engine Power message displayed.

The technician may observe on a scan tool DTC P2135: Throttle Position (TP) Sensor 1-2 Correlation set as Current or in History.


This condition may be caused by the difference between the TP Sensor 1 and TP Sensor 2 exceeding a calibrated value for more than 2 seconds.

Part Information

The initial inventory for P/N 19259452 (Sensor Kit) will be distributed via RIM through a special stocking policy. The dealership parts department personnel will need to approve the stocking policy in order to receive the initial shipment. Subsequent replenishment will also be via RIM. If the parts department is out of inventory of P/N 19259452 (Sensor Kit), then to complete the repair utilize the throttle body assembly.
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