Replace pulley I need to replace the tension pulley on a 2004 GMC Canyon, I was driving home on the highway yesterday when I heard a lot of noise happening under the hood, I didn't know what the noise was so I kept driving, then I noticed my engine light come on and it was flashing the engine was hot, the AC was not on, the Power Steering was not working, and the battery light was flashing. When I did stop I notice that my belt was loose and the tension pulley was all broken up. That was the noise I heard, I have a lot of miles but the truck runs great. This is the first real problem I ever had with this truck. please show me how to replace the tension pulley. thank you 2004 GMC Canyon 3.5 L, 5 cylinders 123,000 mile

SOURCE: Power steering fluid leaking

It all depends on where the fluid is coming from. It could be a ruptured pressure hose, or a seal in the power steering pump. The 2 "dangers " are NO POWER STEERING and burning out the pump with no fluid. A short drive for repairs using " ARMSTRONG " will probably do no harm. Hope this helps

SOURCE: Lack of power when accelerating

You really should have a code check done. There are numerous items that can give you similar symptoms. Two places to look are the fuel filter (usually overlooked till they gum up, and the throttle position sensor (but test it first with an ohmeter. You will need a manual (vehicle specific ones are available at most larger parts stores and most of those stores also do code testing free)

SOURCE: I need to replace a serpentine belt on a 2001 GMC

it is decieving. if the tensioner has an extension of about two inches from the base, it takes a 15 mm to lift it, be easy, make sure the wrench is not going to touch anything as you release it after taking the belt off

SOURCE: 1989 - GMC Sierra 3500 4x4 has 2 issues: 1) dash

put a remote starter cycloid on the firewall that's hooked to the one on the starter to get rid of the having for it to cool in order start it. At least that solved my problem. As for the brake light flashing..well mine does too but everything works....it's most likely a short somewhere. The biggest problem is driving off with the parking brake set. As for the hood. My paint is fried as well. I think it's because there is no insulation installed under the hood. Who knows. Good luck

Harvey N Tawatao

• 3854 Answers
• Posted on Mar 16, 2010

SOURCE: 95 GMC Sierra 4x4 350 5.7 rough idle problem

It sounds like a MAP sensor going bad. MAP is short for manifold absolute pressure sensor, it senses the manifold pressure and applies the right amount of gas with the right amount of ignition timing so the car runs and performs well if this does not work properly. It throws off the whole loop cycle for the computer, which in turn makes it run badly and get poor fuel economy. It can causes the engine to have a lack of power, combined with a loss of fuel economy. Poor take offs and sometimes an occasional stalling may occur if the MAP sensor is faulty and sending the wrong signals to the ECM.
Hope this helps and thank you for using Fixya.
Here is a link that my help you in the future. http://www.troublecodes.net/GM/