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Sierra 1500

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Question
My heater only blows on 1 thru 4 changed
This vehicle uses a high speed blower relay located on top of blower case by blower resistor. The relay is energized when the blower switch is moved to highest speed only. If you are getting all the lower speeds but...
Question
blower motor
The blower motor on this vehicle may have a blower wire connector that is overheated due to a blower motor drawing excessive amperage. Have the blower connector checked for overheating and replace connector and blower motor to fix the erratic...
Question
Transmission slipping need to swap 2001 GMC Silverado
Hi there - yes, both of you have the 4L60E transmission (w/4WD rear housing). Since you both have the 4.8l engines, this should be a bolt-up project. Good luck with it!
Question
just drove a brand new truck off the lot today and 10 minutes down the road it starts blowing blue smoke out the exhaust and engin
Hello, thank you for writing in. In this situation you need to make sure you take the vehicle back to the dealership immediately. Assuming it is already there, they should be able to compensate for your time and energy. There...
Question
ran great then one day just shut off just cranks no start
Hi there. This can be caused by a number of things. Most of the time if the vehicle stalled while driving then it is caused by a weak fuel pump. If the fuel pump can be heard but it will...
Question
Driver side low beam and taillight not working.
Hi there. The headlight bulbs got burned out due to the wires touching. Replace the low beam headlights and the taillight bulbs as they probably burnt out from the short in the system. If the bulbs are good, check the...
Question
The engine of the car runs, but when I push the gas pedal it does not accelerate, and the engine does not rev.
Hello. It sounds like you may have an issue with your throttle position sensor. This sensor sends a reference voltage to your power-train control module, which uses that to determine ignition timing and fuel trims. If the power-train control module...
Question
When you have a leak in your pressure hose for your power steering do you have to change both hoses or just the one that is leakin
The leaking hose of course, definitely required replacement. As for the other one, there are two schools of thought on that. One - The other line is not leaking so leave it alone. Replace it if and when it fails....
Question
can bent axle cause spider gear to break?
Hello, when you have a failure in the rear differential assembly the metal debris will ruin bearings. A shim kit may be required to set-up the diff. to proper specs. A bent axle can damage gears. There are measurements that...
Question
oil pressure on 80 what can be the problem?
The best scenario is if the oil pressure sending unit is simply bad. The sending unit can be tested and/or you can simply tee in a known good gauge to rule the sending unit in or out as the cause....
Question
Can i drive my truck with a small leak from the oil pan gasket
Hi There, Unfortunately, an oil leak from the oil pan is the area of the motor with the largest capacity of oil. A leak from this area can quickly go from very minor to very major with little time to...
Question
Brake system warning after jumpstarting girlfriends car
Hi there: In some instances, when you jump start a vehicle, an electrical surge will be sent through the vehicle being jumped. Generally, this will not impact sensors or trigger warning lights to illuminate; however, it is possible that is...
Question
Power steering problem
Hello. From what you are explaining it sounds like your power steering pump is failing. I usually start by checking the tightness of the power steering belt. If the belt is fine then I check the pressure coming from the...
Question
Steering noise
Hi Ryan: Without being there to physically inspect your GMC Sierra, it's virtually impossible to tell you where to start looking. In most cases, when you have a suspension alternation completed, the steering also will require some aftermarket fabrication components...
Question
If I replace the intake manifold gasket, is any computer reset involved?
You should not have any kind of computer reset unless your check engine light is on now. If it is on now then you would still need to have it checked and cleared after doing the {intake manifold gasket.](https://www.yourmechanic.com/services/intake-manifold-gaskets-replacement) You...
Question
Rear suspension
You would know what needs to be done more than anyone. Depending on the kit that was installed you most likely need to replace springs and shocks. Locate the kit your truck had installed and look at the list of...
Question
Check engine light flashing
The traction control system monitors the steering stability of the vehicle and engages when loss of traction has been detected. This is done by the use of electronic sensors that communicate with the Power Train Control Module (PCM) regarding steering...
Question
Possible lower ball joint problem based upon visual inspection, causing steering wheel vibrations
Hello. Steering wheel shimmy can be caused by a wide variety of issues, however worn ball joints are one of the more common causes. This is more likely if the vehicle is equipped with a lift kit, as a lift...
Question
Squeaky Brakes
Hello there, brake squeak is a very common issue with your 2006 GMC Sierra. There are likely causes of brake squeak such as incorrect pad material, item stuck in backing plate, caliper guide pins seized, or worn brake pads. Though...
Question
Why does my engine light keep coming back on after I fixed the part the code it blew
Hi there: One of the major problems car owners have with mechanics or dealerships specifically is that they really don't go the extra effort to fix all issues with a vehicle. In most cases, they'll receive a complaint from a...

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