Showing articles & questions for topic
Sierra 1500

Related questions

Question
My truck decelerated from 65mph on a flat surface without any warning.
First check for any fuel in the fuel tank. If there is fuel in the fuel tank, then turn on the key and listen for the fuel pump to hum. If there is not humming sound, then check the fuel...
Question
Transmission has delay shifting and no second. Change fluid and filter replace 1and 2 shift seliond no change.
Hi There, What you are describing sounds like possibly a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as vehicle speed sensors, wheel speed...
Question
Interior dim lights out and won't come back on
Hello, thank you for writing in. The fuses that you need to check are located inside the cabin near the dashboard. These are the fuses pertaining to lights you are concerned with. Keep in mind the vehicle should always be...
Question
Dead truck battery every time it's left off for a few hours.
If the battery is new and charging system output has been measured and is within specifications, the only reason a battery will discharge is if the car sits for a long period of time (batteries will self-discharge even if not...
Question
Hazard lights are on and will not shut off.
Hi there. The hazard light switch may have been damaged during the event that the airbag was deployed. Get the airbag replaced and reset the airbag light and see if the hazard lights go out. On newer cars, the hazard...
Question
My car will run but stall out randomly.
The fuel pump is going to most likely be the cause of the no start and stalling. You may also have problem with the fuel supply module if your truck is equipped with the flex fuel control module. You will...
Question
Can you help me figure out how to fix a wobble in my truck..
Hello there a few things that I recommend checking to help you find the cause of your wobble. It is possible that the drive shaft is out of balance, the leaf spring bushings are bad, worn shocks or possibly bad...
Question
If my ecm pcm touches the frame and it sparks does it cause the computer to mess up.
Hi there. What you are describing is an indication of a serious electrical glitch within the ECM or PCM. The best way to determine this is to either have a professional mobile mechanic come to your location and attempt to...
Question
My truck is pulling left during hard braking and pulling hard right when accelerating or getting jostled. 2012 GMC Sierra
Hi there - I would get a 2nd opinion on the front suspension. Something, hard to say what without direct inspection, is shifting under load: a control arm bushing, suspension link, or tie rod end. I recommend a steering and...
Question
Both fans stay running after truck is off and key is remove until battery is dead. Checked relay they are good.
Hi there. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched...
Question
Overflow tube in the front differential is leaking oil constantly on a 2014 GMC Sierra 1500.
Disconnect the vent tube on the differential and blow through the tube on the differential. If you are unable to blow through it, then the differential is creating too much pressure and pushing out the oil through the tube. I...
Question
Reduced engine power message is on the dash.
The reduced power light is on for either the catalytic converter is overheating or the transmission is malfunctioning. If the vehicle is able to shift through all of the gears, then check the engine to see if there is a...
Question
Shifting into 2nd at high RPM
Hi there. It is very possible that the speed sensor or shift solenoid is the primary source of this type of issue with the first to second shift. However, a worn out torque converter or an obstruction inside the transmission...
Question
Lost all transmission fluid near radiator overnight 2004 GMC Sierra
Hello - there are fittings at the radiator where the transmission oil lines go into the radiator side tank. Perhaps one or both of these fittings came loose, or broke - leaking fluid from that point? Gravity would do the...
Question
Engine light on with P0171 code
The cause behind diagnostic trouble code P0171 is easiest to find by looking at the secondary firing patterns on the Bank one cylinders. That will confirm if the too lean condition, that has caused the code to set, affects all...
Question
Wheel is free but the key won't turn
You should try a different key if you have a spare one to try. If the spare key turns the ignition now then the original key is worn and needs replaced.If you do not have an extra key then look...
Question
Reduced engine power light
Hi There, The reduced engine power light may come on for many different reasons when the transmission or the engine encounters a serious problem. The reduced engine power mode is a safety feature to ensure that additional damage is not...
Question
I need to now if my 2001 GMC Sierra 1550 4WD had a 3 or 4 spline pitman arm.
Hi there. To see if the pitman arm has 3 or 4 splines, check the splines on it with the nut off. Use a flashlight and look at the splines to see if there are 3 large flat areas or...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question