20 Most Recent 2011 GMC Sierra 1500 Questions & Answers

May be a problem with the mass air flow (MAF) sensor - I would check the readings from it to make sure it is working properly. It is very sensitive to fouling which can cause this problem.

2011 GMC Sierra... | Answered on Jul 03, 2017

There is a tail lights fuse for the truck, but not for the trailer.
First, check that your left tail light on the truck is working, if not fix the problem (new bulb, bad contact, fuse).
Then the obvious suggestions regarding the trailer are: Check the tail light portion of the bulb to be sure it is not blown. If good (best to put in new one to be sure), then check the wiring from the front of the trailer all of the way to the non working bulb, including every connection and at any place it is secured to the trailer frame. If all is good with the trailer circuit and bulb, then check the truck's trailer connector, including any adapters. If by chance the truck is wired with a flat 4 wire harness the problem may be solved (but usually the blinkers are the problem). Modern trucks require a 5 wire harness which self adapts to the standard 4 wire trailer circuit. Check for dc power (12 volts) from the truck's female connector. One wire will be ground, others will be taillights (turn on headlights), brake lights (have someone press brake pedal), and blinkers (turn on switch and blinkers).

2011 GMC Sierra... | Answered on Oct 12, 2016

Hook up a code reader to the unit and pull active codes out. Trace your problem from there. If you dont have a code reader take your truck to a parts store (Auto Zone Pepboys ect.) they will hook up to your truck and pull the codes out for you for free and explain what the codes mean.They will be more than happy to sell you the necessary parts to repair it.

2011 GMC Sierra... | Answered on Jan 13, 2016

Your reduce power light is on for an apparent reason, it is running rough! Scan for a code and it may end up being a bad throttle position sensor and dirty throttle body.

2011 GMC Sierra... | Answered on Jan 25, 2015

If your at autozone then people at front desk can help. Myself I just look it up in the owners manual. Most just need to push a clip of some sort and push wiper assembly down and it should go back on with a "snap/click" when you put on the new one. I recommend asking the local autoparts store to show you how to do it for your vehicle. Otherwise YouTube, car dealer, or manufacturer can tell you how.

2011 GMC Sierra... | Answered on Dec 12, 2014

Code P0454 is :

Evaporative Emission Control System Pressure Sensor
hope it help

2011 GMC Sierra... | Answered on Dec 08, 2014

On the door the part u cant see when its shut is a slide change it n ur good to go

2011 GMC Sierra... | Answered on Nov 26, 2014

if this has no shut off switch for the passenger airbag then disconnect the yellow connector under the dash on the same side and allow 15 minutes before attempting to work on that side.

2011 GMC Sierra... | Answered on Aug 18, 2014

Isn't this under warranty?

2011 GMC Sierra... | Answered on Feb 15, 2013

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