GMC Sierra - Popular Questions, Answers, Tips & Manuals


I would start with the oil pressure sending unit. These can fail. Often replacing them will then have correct oil pressure readings. Oil filters (all of them) are designed to allow oil to flow through them or around the filter media if it's plugged thus not starving the engine of oil flow and pressure. So it is unlikely that is the problem.

GMC Sierra Cars... | 37 views | 1 helpful votes


When your trying to get help for a pickup you need to list the year, make, model, sub model, engine & 2 or 4 wheel drive? Without knowing if it is 2 or 4 wheel and what engine I'd just be guessing.
On some models the backup light it combined with the Nuteral Saftey Switch on the side of the transmission. There is a pink wire that runs from the switch to the back bumper. It's only Hot when the key is on and in Neutral. Since I'm guessing I hope this helped you?

GMC Sierra Cars... | 30 views | 0 helpful votes


From your description it would seem the towing electrics have been incorrectly wired or perhaps the problem is with your trailer.

My advice is to go back to basics, get yourself a diagram and investigate as deep as necessary. Your car is probably filled with digital electronics including a multiplex lighting system. If the towing electrics are an official GM kit there should be no problems but if it has been wired the old fashioned way a multiway relay should be used to prevent the trailer drawing/interfering with the multiplexed vehicle lights.
That is the safest way but it does mean the circuit becomes more complex.

2002 GMC Sierra | 34 views | 0 helpful votes


All your windows and door locks should go through the Master Control which is the one on the drivers door. I would guess that is the problem. I've had to replace the Master Switch on a few different. GM vehicles.

GMC Sierra Cars... | 60 views | 1 helpful votes


Take it to a qualified repair shop.

GMC Sierra Cars... | 49 views | 0 helpful votes


Generally it is located on the top of the fuel pump module external of the tank. On your model it should be the black box on top like the one in this picture.https://contentinfo.autozone.com/znetcs/additional-prod-images/en/US/dlp/EFG1519/6/image/4/

GMC Sierra Cars... | 36 views | 0 helpful votes


Hi friend, firstly on the main command where you can control all the windows has a button that when you put it off only the driver's window will work, so you have verify if the button is not activated!! .if it's not activated then you will have to control the fuse related to the windows, an if all the fuses are fine then go to the windows motor .

GMC Sierra Cars... | 37 views | 1 helpful votes


Replace the fuel filter and have the fuel pressure and flow checked

GMC Sierra Cars... | 30 views | 0 helpful votes


There's a website that has all this in formation about all this and manuals everything totally free there are many actually but I personally like few reliable-store for eg. .. let me know if u need help
thanks

GMC Sierra Cars... | 74 views | 0 helpful votes


hello
u will find a lot of wiring diagrams and circuit diagrams help books and stuff like this at reliable-store
the girl in the chat box can help u instantly... im a frequent buyer there since Im a mechanic so take help from there

GMC Sierra Cars... | 65 views | 0 helpful votes


Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

2004 GMC Sierra | 25 views | 0 helpful votes


Could be something as simple as the connection came unplugged. If not, disconnect it at the lug and check it with a test probe to see is there power from the harness to the motor. If no power, check fuses and connection at the sending unit.

2005 GMC Sierra | 34 views | 0 helpful votes


Perhaps the battery won't take a charge. If it's a few years old, quite possible. Other than that, check the cable connections. Put your multimeter on the battery terminals with the engine running. If it's showing around 14V then it's all good and your battery isn't taking that charge

GMC Sierra Cars... | 42 views | 0 helpful votes


The service and repair manual with pictures and diagram will help you to locate and fix the problem on your own easily and you will get the manual from the given link http://toolsnyou.com/

GMC Sierra Cars... | 44 views | 1 helpful votes


Test with a voltmeter , metal tab's on top of fuse , should have battery voltage on both tab's . Don't go by look's good , test to know for sure . Look at a wiring diagram an test the whole electrical circuit to find the problem . Doesn't it work at any speed ? Does it have manual or automatic climate control ?
TechConnect Ep 37 How To Test Chevy Blower Motor Resistor DR775

GMC Sierra Cars... | 105 views | 0 helpful votes

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