GMC Troubleshooting Questions? Ask a Mechanic for Answers
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Can you tell me what has been checked,tested or repaired to try and resolve this fault here?
Let me know so we can continue,thanks Pete.
Have you removed the drive belt at all to see if the engine then turns over?
Try removing the drive belt and see if the engine then turns with the starter installed and starts.If it does then one of the components the drive belt was rotating is seized and it may be the power steering pump needing replaced.If the engine still does not turn over properly then this indicates an internal mechanical fault.This can be seized bearings or bearing drag on the crank shaft as this can occur with the engine needing rebuilt or replaced.It may also be a hydro lock issue with coolant in the cylinders or excess fuel from faulty injectors needing replaced.
I would start with removing the drive belt and see if this then allows the engine to crank and start then check the pulleys from there to locate the fault.But if this doesnt work then this is internal and the engine will need checked internally.
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The line smoking can indicate pressure build up if this was a hydraulic line which can indicate a power steering pump fault or another issue like a power steering gear fault.I havent seen a line smoke like that before myself,make sure no wires are melted to the line causing this issue here.But this is leaning more towards a pump fault issue here possibly.
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O.k.,it is possible the pump is at fault causing this here.I would try removing the pump drive belt and see if it starts.If it does then the pump most likely needs replaced.The steering gear will need checked as well for any issues.
You can remove the belt briefly to see if it starts and runs.If it starts up then turn it off right away and check for any seized components needing replaced.