Question about GMC Cars & Trucks
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Posted on Jan 02, 2017
I would check to see if it is the Axle Actuator. On that model truck there is an upgrade available that is electrical upgrade. Instead of using a vacuum to engage the axle, it uses a small electric motor. The cost for this part isn't much more than the older vacuum model. Usually the electrical one runs around $100. This is a relatively easy change that most any person can do with just about any experience.
Posted on Feb 03, 2009
Is the "service engine" light on at all?
If so, what codes are present.
Have you checked the EGR valve. If the valve is stuck, the engine will idle very poorly. You can remove it and clean the carbon deposites and make sure it moves freely.
The EVAP purge solenoid will also cause an idle problem but should show up as a service engine light problem.
Let me know.
Posted on Apr 20, 2009
Did you check the fuel pressure and the fuel pressure regulator???. Not sure if you have the X or the W engine. The X you need 13PSI to 14.5PSI to have fuel injectors to run right, if you have the W type engine you need 60PSI to 65PSI to have the fuel injector to run right. If the fuel pressure is bad it's could be leaking through the diaphragm into the manifold. Good luck and hope this helps.
Posted on Jun 12, 2009
I would suggest stopping by an AutoZOne or O'Reilly's and "borrow" their Scan Tool to erase any codes.
TO reset the "Change Oil" light, turn the ignition to ON (do NOT start the car). Press the accelerator pedal all the way down (then release) to the floor 3 times in less than 5 seconds. Change Oil light should flash then go off. If not, try it again. The trick is to get this done in 5 seconds ro less.
Posted on Apr 01, 2010
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